Method for radio communications between moveable objects

FIELD: radio communications technologies.

SUBSTANCE: base stations are positioned with given mathematical expectation and dispersion of distance between closest base stations in vertices of conventional nodes, densely covering maintained territory. Radio-signal, received from moveable object at base stations, which are considered first, is transmitted from these base stations to second base stations and further relay-wise to following base stations, being within effective distances of previous base stations. Transmissions of radio-signals is provided for within given frequencies spectrum, while following and previous base stations perform radio signals transmissions in non-overlapping frequency bands.

EFFECT: simplified implementation of method.

2 cl, 12 dwg, 1 tbl, 2 ex

 

The technical solution relates to radio communications, and in particular to methods of radio communication between mobile objects.

There is a method of radio communication between mobile objects (see, for example, Pascalidou, Paisano. The maintenance of avionics. - M.: Transport, 1990, s-92), namely, that transmit radio signals from the first movable object, take these signals to the second movable object.

This method allows a great range of radio communication, however, requires the use of the first movable object transmitting device of a large capacity, which complicates the method.

There is a method of radio communication between mobile objects in cellular radio systems (see, for example, Ratynski MV Basics of cellular communication. Edited Dbimon. - M.: Radio and communication, 2000, p.20-68), namely, that place the base station in the centers of the conditional cells, representing equal regular hexagons, tightly attached to each other by their sides, densely covering the service area, with ranges of validity specified inonce large length of each side of a regular hexagon, set seven non-overlapping frequency bands of radio signals transmitted from all base stations and received at the second movable object, and the seven predefined frequency bands of radio signals, transmitted from all base stations, ask each base station frequency band of radio signals transmitted from this base station other than the specified frequency band of the information signal transmitted from the nearby base stations transmit from the first movable object signals, which take on the base station, within a range which is the first moving object, and convert the optical signals that transmit through the fiber-optic communication lines in the switching center, which determines the base station, within a range which is second movable object, which is then passed from the switching center corresponding to the optical signals fiber optic communication, which this base station is converted into radio signals that transmit in a given frequency band, and then take on the second movable object.

This method provides for the use of low-power radio signals greater range of communication, however, requires the use of fiber-optic communication lines and definition in the switching center base station within range which is second movable object, which complicates the method. In addition, the introduction of additional base stations by, for example, to reduce power and emitted radio signals, time-consuming presadenia frequency bands of radio signals transmitted from each base station, which also complicates the method.

Solved technical problem is a simplification of the method based on rational base stations and the assignment of frequency bands of radio signals transmitted from base stations in accordance with the distance of the base station from the first mobile object.

The solution of the technical problem in the way of radio communication between mobile objects, which consists in the fact that place the base station with predetermined ranges of validity, transmit signals on the first movable object, which take on base stations within range of actions which is the first moving object, and convert the signals that pass from the base stations, these signals take the base stations within range which is second movable object, and is converted into radio signals, which is transmitted from the base stations and take the second movable object is achieved by the fact that the placement of base stations perform with specified mean and variance of the distances between the nearest base stations, signals, convert the signals received at the base stations within range of actions which find the camping first movable object, are radio signals, and transmitting the radio signals from the base stations to the base station, within the range which is second movable object, is that receive radio signals transmitted from the first base station, which base station within range of actions which is the first moving object, at the second base stations located within the ranges of validity of the first base station, and transmit them in a given frequency band not overlapping with the frequency band of radio signals transmitted from the first base station, then in the same way consistently, in all directions from the first base station receive radio signals transmitted from the (k-1)-x base stations, on all k-x base stations located within the ranges of steps (k-1)-th base station, and k-e base station are not (k-2)-th base stations, and transmit them in a given frequency band not overlapping with the frequency band of radio signals transmitted from a (k-1)-th base stations, where k=3, 4, ... , K are positive integers, and the set the frequency band of radio signals transmitted from the first base station is a first specified frequency band set by the frequency band of radio signals transmitted from the second base station is the second set band is Ascot, a given frequency band of radio signals transmitted from the k-x base stations, is k-I specified frequency band, where k=3, 4, ... , K are positive integers, and the first specified frequency band, the second specified frequency band, l-I specified frequency band, where l=3, 4, ... , L are positive integers, 3≤ L≤ K, are non-overlapping k-I specified frequency band, where k=3, 4, ... , K are positive integers, coincides with the l-th predetermined frequency band when the condition

l=k-L[k/L]

where [k/L] is the largest integer that does not exceed k/L.

While radio signals transmitted in each specified frequency band with the n-th base station, where n=1, 2, ... , N are positive integers, N is the number of base stations, represent the sum of the signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ... , M are positive integers, determine n.

The term “moving object” is generally accepted (see, for example, Soloviev Y.A. satellite navigation System. ): Eco-trends, 2000, p.47). To moving objects include, in particular, various vehicles equipped with two-way radio equipment.

The term “base station” is also generally accepted (see, for example, Gromakov Y.A. Standards and system p is movable partition radio. ): Eco-Trends, 2000, p.87-154). Base stations are referred, in particular, stationary subjects, include transceiver equipment.

Figure 1. there are three groups of equal right shapes, tightly attached to each other by their sides, densely covering the plane, for the case where the number of correct triangles is equal to six, the number of squares is equal to four, the number of regular hexagons is equal to three.

Figure 2 shows conventionally the base station placed with a random scatter around the tops of the conditional cells, which is equal to the correct squares, tightly attached to each other by their sides, densely covering the service area of the first movable object and the second movable object with the directions of transmission of radio signals and areas of eight base stations, for the case where the number of base stations is equal to sixty.

Figure 3 shows the conditional timing diagrams of the transmission radio signal with the first movable object, from the first base station from the second base station and the third base stations.

Figure 4 shows conditional spectra of radio signals transmitted from the two nearest k-x base stations within range of one of the (k+1)-th base stations, and the spectrum at the input of the base station for the case when K is a torus specified k-th base stations correspond to the values n=17 and n=28.

Figure 5 shows a system for implementing the method containing the transceivers are placed one on each base station, the transmitter is placed on the first movable object and the receiver is placed on the second movable object, for the case where the number of base stations is equal to fifteen.

Figure 6 shows the transceiver.

Figure 7 shows the first block group channel is included in each transceiver, and the transceiver 7 is not shown.

On Fig depicts the second channel processing, is included in each transceiver, and the transceiver on Fig not shown.

Figure 9 shows the transmitter.

Figure 10 depicts the receiver.

Figure 11 depicts the second block group channel, which is part of the receiver, and the receiver 11 are not shown.

On Fig depicts a fourth channel processing part of the receiver, and the receiver on Fig not shown.

The system for implementing the method, presented in figure 5-12, contains placed one on each of the N base stations 1 transceivers 2, placed on the first movable object 3 transmitter 4, placed on the second movable object 5 receiver 6, each transceiver 2 includes the first receiving antenna 7, the first block of 8 group channel that soda is separated by the first band-pass filter 9, the first low noise amplifier 10, the first Converter 11 frequency first local oscillator 12, the first amplifier 13 intermediate frequency, each transceiver 2 also contains L+1 of the first channels 14 of treatment, each of which contains a second band-pass filter 15, a second frequency Converter 16, a second local oscillator 17, M second channels 18 processing, and M>log2N, each of which includes a third band-pass filter 19, the first block 20 squaring, the first integrator 21, the first analog-to-digital Converter 22, each transceiver 2 also includes a first analog switch 23, the first demodulator 24, the first microcontroller 25, the second analog switch 26, the memory block 27, block 28 job, M modulators 29, each of which includes a third inverter 30 frequency, the third local oscillator 31, the third analog switch 32, each transceiver 2 also contains the adder 33, the first amplifier 34 power, the first transmitting antenna 35, the transmitter 4 includes a source 36 of messages, the fourth inverter 37 frequency, the fourth local oscillator 38, a second amplifier 39 power, the second transmitting antenna 40, the receiver 6 includes a second receiving antenna 41, the second block 42 group channel, which has a fourth band-pass filter 43, the second low noise amplifier 44, the fifth inverter 45 frequency, the fifth local oscillator 46, the Torah amplifier 47 intermediate frequency, the receiver 6 also contains L+1 third channel 48 of treatment, each of which contains the fifth band-pass filter 49, the sixth inverter 50 frequency, the sixth local oscillator 51, M fourth processing channels 52, and M>log2N, each of which contains a sixth bandpass filter 53, the second block 54 squaring, the second integrator 55, the second analog-to-digital Converter 56, the receiver 6 includes a third analog switch 57, the second demodulator 58, the second microcontroller 59, terminal block 60.

Each transceiver 2 output of the first receiving antenna 7 is connected to the input of the first bandpass filter 9 of the first block group 8 channel, in which the output of the first bandpass filter 9 is connected to the input of the first low-noise amplifier 10, the output of which is connected to the first input of the first Converter 11 frequency, a second input connected to the output of the first local oscillator 12, the output of the first inverter 11 frequency connected to the input of the first amplifier 13 intermediate frequency, the output of which is connected to the input of the second bandpass filter 15 of the first channels 14 processing, in each of which the output of the second bandpass filter 15 is connected to the first input of the second the frequency Converter 16, a second input connected to the output of the second local oscillator 17, the output of the second frequency Converter 16 is connected to the inputs of the Tr is read bandpass filters 19 second channels 18 processing, in each of which the output of the third bandpass filter 19 is connected to the input of the first unit 20 squaring, the output of which is connected to the input of the first integrator 21, the output of which is connected to the input of the first analog-to-digital Converter 22, the respective outputs of the first analog-to-digital Converter 22 is connected to the corresponding inputs of the first microcontroller 25, the outputs of the third bandpass filter 19 is connected with the relevant switched the inputs of the first analog switch 23 with the respective control inputs connected to respective outputs of the first microcontroller 25, the output of the first analog switch 23 is connected to the input of the first demodulator 24, the output of which is connected with the respective input of the first microcontroller 25 and with the first switched input of the second analog switch 26, the second switching input connected to a corresponding output of the first microcontroller 25, respective outputs of which are connected to respective control inputs of the second analog switch 26, the output of which is connected with the first inputs of the third inverters 30 frequency modulators 29, in each of which a second input of the third inverter 30 frequency coupled to the output of the third local oscillator 31, the output of the third preobrazovala the I 30 frequency is connected with a switched input of the third analog switch 32, the respective outputs of the first microcontroller 25 connected to respective control inputs of the third local oscillators 31 and the corresponding control inputs of the third inverters 30 frequency, the outputs of the third analog switch 32 is connected to the corresponding inputs of the adder 33, the output of which is connected to the input of the first amplifier 34 power, the output of which is connected to the input of the first transmitting antenna 35, to the corresponding inputs of the first microcontroller 25 are connected to respective outputs of the block 27 and memory unit 28 jobs in the transmitter 4 channel 36 messages connected to the first input of the fourth inverter 37 frequency, a second input connected to the output of the fourth local oscillator 38, the output of the fourth inverter 37 frequency connected to the input of the second amplifier 39 power, the output of which is connected to the second input of the transmitting antenna 40 in the receiver 6 the output of the second receiving antenna 41 is connected to the input of the fourth bandpass filter 43 of the second unit group 42 of the channel, in which the output of the fourth bandpass filter 43 is connected to the input of the second low-noise amplifier 44, the output of which is connected to the first input of the fifth inverter 45 frequency, a second input connected to the output of the fifth local oscillator 46, the output of the fifth inverter 45 frequency connected to the input of the second usilitel the 47 intermediate frequency, the output of which is connected to the inputs of the fifth bandpass filters 49 third channel 48 processing, in each of which the output of the fifth bandpass filter 49 is connected to the first input of the sixth inverter 50 frequency, a second input connected to the output of the sixth local oscillator 51, the output of the sixth inverter 50 frequency is connected to the inputs of the sixth bandpass filters 53 fourth processing channels 52, in each of which the output of the sixth bandpass filter 53 is connected to the input of the second block 54 squaring the output of which is connected to the input of the second integrator 55, the output of which is connected to the input of the second analog-to-digital Converter 56, the corresponding outputs the second analog-to-digital Converter 56 is connected to the corresponding inputs of the second microcontroller 59, sixth outputs of bandpass filters 53 are connected with the relevant switched the inputs of the third analog switch 57 with the respective control inputs connected to respective outputs of the second microcontroller 59, the output of the third analog switch 57 is connected to the input of the second demodulator 58, the output of which is connected with the corresponding input of the second microcontroller 59, the respective outputs of which are connected to corresponding inputs of terminal block 60.

The base station 1 is placed with the given the mean and variance of the distances between the nearest base stations 1.

Range of base stations 1 are set according to the given mathematical expectation and variance of the distance between the nearest base stations 1.

Bandwidth of the second bandpass filter 15 L of the first channels 14 processing and fifth bandpass filters 49 L third channel 48 processing coincide with the respective predetermined frequency band transmission transceivers 2 base stations 1, is shifted along the frequency axis down to the tuning frequency of the first local oscillator 12 and not overlapping between them, and the tuning frequency of the first local oscillator 12 and the fifth local oscillator 46 are the same.

Bandwidth of the second bandpass filter 15 (L+1)-th of the first channel 14 and processing the fifth bandpass filter 49 (L+1)-th third channel 48 processing coincide with a given frequency band of transmission of the transmitter 4 of the first movable object 3, is shifted along the frequency axis down to the tuning frequency of the first local oscillator 12, and the specified transmission bandwidth transceivers 2 base station 1 and the transmitter 4 of the first movable object 3 are non-overlapping.

The bandwidth of the respective third bandpass filters 19 of all of the first channels 14 processing and sixth bandpass filters 53 all third channel 48 processing coincide with each other.

The method consists in the following.

Place the base station with predetermined ranges of steps and with specified mean and variance of the distances between the nearest base stations 1.

In some tasks of the base station 1 is placed in the service area with random variation around the set point. (This situation occurs, for example when you reset the base station 1 with the aircraft, when as a result of exposure to many random factors drop points, base stations 1 cannot be calculated.) The distance between the nearest base stations 1 is a random variable, which should be characterized by mean and variance.

The base station 1 is the nearest relative to the base station 1, if the distance between them is not larger than the distance between the given base station 1 and any other base station 1. Therefore, several base stations 1 may be the closest relative to the base station 1, if the distance between each of them and this base station 1 are approximately equal to each other and not larger than the distance between the given base station 1 and any other base station 1.

If the placement of base stations 1 in the plane defined mathematical expectation of the distance between the nearest base stations 1, it is equivalent to placing the base station 1 with a random scatter around the tops of the conditional cells, representing equal regular polygons, tightly adjacent to each is own by the parties, tightly cover the service area, and the length of the sides of these regular polygons equal to the expected distance between the nearest base stations 1 and the variance of the distance between the nearest base station 1 determines the degree of sparseness base station 1 near the peaks of the conventional cell.

In that case, if the service area is a plane equal to the correct polygons, tightly attached to each other by their sides, densely covering the service area may be just the right triangles, rectangles (squares) and hexagons, because of the following.

The value of the internal angle γ (1) equal (see Bronstein, I.N., Semendjajew K.A. Handbook of mathematics for engineers and University students. - M.: Nauka, 1980, page 287)

where q is the number of sides of the polygon.

Dense in the plane are equal regular polygons, each vertex, for example (figure 1), is common to R. polygon, and R is an integer that is not less than three and equal to

These conditions are met only three values q={3, 4, 6}, which was to be shown.

The placement of base stations 1 (figure 1) at the vertices of a conventional cell, predstavlyayushie is an equal right triangles, tightly attached to each other by their sides, densely covering a service area equivalent to the placing of base stations 1 in the centers and vertices of conventional cells, representing equal regular hexagons, tightly predpriyatiya to each other by their sides, densely covering the service area (see RF patent for the invention № 2195776, bull. No. 34, dated 10.12.2002. The method of determining the location of a moving object/ Turkish AS, kupersmidt PV and others).

The range of the base station 1 when the non-directional transmission of radio signal power Psendis the distance within which the power of these signals when they are omnidirectional reception on the other base stations 1 and the second movable object 5 is not less than the threshold value of Pprmin.

The range of the base station 1 with directional reception of radio signals is the distance within which the power of these signals generated by the omnidirectional transmission from the other base stations 1 and from the first movable object 3 signal power Psendnot less than the threshold value of Pprmin.

If the corresponding power value Psendthe transmitted radio signals and thresholds mlsnet Pprminthe received radio signals in both cases, the Rav is s, the range of the base station 1 during transmission and reception of radio signals are the same and subject to the propagation of electromagnetic waves in free space is equal to (see, for example, theoretical foundations of radar. Edited Vaitulevich. - M.: Soviet radio, 1978, S. 402)

where c is the speed of light in vacuum; f is the operating frequency.

Under the range R of the base stations 1 understand equal range in the transmission and reception of radio signals.

When the directional omnidirectional reception and transmission of radio signals in free space distance R action defines a circular area of the base station 1 with center at the point of placement of the base station 1 and radius R.

The distance R of the base stations 1 set by specified mathematical expectation mdand dispersion Ddthe distance d between the nearest base stations 1.

With a uniform density f(d) distribution of the random variable d on the interval(see, for example, Handbook of theory of probability and mathematical statistics. - M.: Nauka. The main edition of physico-mathematical literature, 1985, S. 116, 117):

and

the value of R is set by the formula

Conditions (4)-(6), in particular, satisfy the relation of md= 300 m; Dd= 75 m2; R = 315 m

Then under the conditions (4)-(6) reliable is the event consisting in the fact that the number of base stations 1 located within distance R of each base station 1, does not exceed R, defined by formula (2).

In the case of base stations 1 (figure 1) with a random scatter around the tops of the conditional cells, representing equal squares, tightly attached to each other by their sides, densely covering the serviced territory, and subject to the conditions (4)-(6) reliable is the event consisting in the fact that within distance R of each base station 1 is four base station 1.

Transmit radio signals from the first movable object 3, which take on the first base stations 1, which is the base stations 1, within distance R which is the first moving object 3.

When the conditions (4)-(6) reliable is the event consisting in that the first base station 1 does not exceed four. Figure 2 shows the case in which the first base station 1 is a base station 134, 135, 144and 145.

Passed from the first base station 1, the radio signals in a given frequency band. Take audiosignal, transmitted from the first base station 1, the second base station 1, located within a distance R of the operations of the first base station 1, and transmits them to the specified frequency band not overlapping with the frequency band of radio signals transmitted from the first base station 1. Then in the same way consistently, in all directions from the first base station 1 receive radio signals transmitted from the (k-1)-th base station 1, for all k-x base stations 1 located within distance R of steps (k-1)-th base station 1, and k-e base station 1 are (k-2)-th base station 1, and transmits them to the specified frequency band not overlapping with the frequency band of radio signals transmitted from a (k-1)-x base stations 1, where k=3, 4, ... , K are positive integers.

When this predetermined frequency band of radio signals transmitted from the first base station 1, is first specified frequency band set by the frequency band of radio signals transmitted from the second base station 1, is a second specified frequency band set by the frequency band of radio signals transmitted from the k-x base stations 1, is k-I specified frequency band, where k=3, 4, ... , K are positive integers, and the first specified frequency band, the second specified frequency band, l-I specified frequency band, where l=3, 4, ... , L are positive integers, 3Ȧ L≤ K, are non-overlapping k-I specified frequency band, where k=3, 4, ... , K are positive integers, coincides with the l-th predetermined frequency band when the condition

where [k/L] is the largest integer that does not exceed k/L.

Function y=[x] is a function of the integer part of x, i.e. equal to the greatest integer not exceeding x (see Bronstein, I.N., Semendjajew K.A. Handbook of mathematics for engineers and University students. - M.: Nauka, 1980, s).

In accordance with figure 2 the second base stations 1 are the base station 124, 125, 136, 146, 155, 154, 143, 133; the third (k=3) base stations 1 are the base station 114, 115, 126, 137, 147, 156, 153, 142, 132, 123; the fourth (k=4) base stations 1 are the base station 14, 15, 116, 127, 138, 148, 157, 152, 141, 131, 122, 113; fifths (k=5) base stations 1 are the base station 16, 117, 128, 139, 149, 158, 151, 121, 112, 13; sixth (k=6) base stations 1 are the base station 17, 118, 129, 140, 150, 159, 111, 12; sedmimi (k=7) base stations 1 are bases the new station 1 8, 119, 130, 160, 11; eighth (k=8) base stations 1 are the base station 19, 120; ninth (k=9) base station 1 is a base station 110(in figure 2 the corresponding base station 1 is covered by dashed lines).

Consider an example, when L=3 (figure 2). In this case, the specified frequency band of radio signals transmitted from the first base station 1 (bandwidth Δ f1), from the second base station 1 (bandwidth Δ f2and third base stations 1 (bandwidth Δ f3), are non-overlapping. According to the formula (7) with a given frequency band Δ f1match the specified frequency band of radio signals transmitted from the fourth (k=4; l=1) base stations 1, with the seventh (k=7; l=1) base stations 1 and with other k-x base stations 1, satisfying the condition (7) for l=1; with a given bandwidth Δ f2match the specified frequency band of radio signals transmitted from the fifth (k=5; l=2) base stations 1, with eight (k=8; l=2) base stations 1 and with other k-x base stations 1, satisfying the condition (7) for l=2; with a given bandwidth Δ f3match the specified frequency band of radio signals transmitted from the sixth (k=6; l=3) base stations 1, with the ninth (k=9; l=3) base stations 1 and with other k-x base stations 1, satisfying the condition (7) with l=3.

In cast the m case can be condition

and

where f0f1f2, ... , fl-1fl, ... , fL-1fL- the boundaries of the respective set of frequency bands (each given frequency band contains the required guard interval); l=3, 4, ... , L are positive integers.

When L=3 the expression (8) and (9) have the form

and

The number K depends on the size of the area being served, the number N and the characteristics of the base stations 1. For the case of base stations 1, is shown in figure 2, the number K=14.

The transmission of radio signals from the first movable object 3 is carried out in a specified band of frequencies Δ fL+1=fL...fL+1not overlapping with any of the specified frequency bands of radio signals transmitted from base stations 1.

The direction of transmission of radio signals is shown in figure 2 by the arrows. Radio transmission without loops is ensured by the fact that from the first base station 1 transfer when receiving radio signals transmitted from the first mobile object 3 in a given frequency band Δ fL+1but not radio signals transmitted from the second or first base station 1 in predetermined frequency bands Δ f2and Δ f1sootvetstvenno is; second base stations 1 transfer when receiving radio signals transmitted from the first base station 1 in a given frequency band Δ f1but not radio signals transmitted from a third or other second base station 1 in predetermined frequency bands Δ f3and Δ f2respectively; with the k-x base stations 1 transfer when receiving radio signals transmitted from a (k-1)-th base station 1 in a given frequency band Δ fk-1but not radio signals transmitted from a (k+1)-x or other k-x base station 1 in predetermined frequency bands Δ fk+1(when k<K and Δ fkrespectively, where k=3, 4, ... , K are positive integers. Therefore, taking into account formulas (7), if the band Δ fk-1radio signals received on the k-x base stations 1, coincides with a given bandwidth Δ fLthen set the band Δ fkradio signals transmitted from the k-x base stations 1, coincides with a given bandwidth Δ f1.

On the second movable object 5 receive radio signals transmitted from the base station 1 within a distance R which is the second movable object 5.

In accordance with figure 2 on the second movable object 5 receive radio signals transmitted from base stations 128, 129, 138, 139within daleste is R which is the second movable object 5.

Timing diagrams serial transmission of radio signals from the first base station 1 to the borders of the service area is shown in figure 3. Here is the radio signals; T - duration signals; τ - the propagation time of radio signals between the nearest base stations 1, defined by the distance d between them.

The speed of displacement of the first movable object 3 and the second movable object 5 believe so small that the resulting Doppler effect can be neglected.

The transfer from the two nearest k-x base stations 1 signals in the same specified frequency range Δ fkand with equal power values can cause fading in radio on (k+1)-th base station 1, within the range of R which are these the base station 1, where k=1, 2, ... , K are positive integers. Elimination of fading is achieved by the fact that the radio signals transmitted in each specified frequency band with the n-th base station 1, where n=1, 2, ... , N are positive integers, N is the number of base stations 1, represents the sum of the signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m= 1, 2, ... , M are positive integers, determine n.

Any n of the N is converted into the-bit binary code:

where am=1 or 0 in accordance with the decomposition

Thus the m-th digit of the binary code of n2corresponds to m-I set the band Δ fkmin each specified frequency band Δ fkwhere m=1, 2, ... , M, k=1, 2, ... , K are positive integers, and the power of the Pm sendtransmitted in the m-th predetermined frequency band of the radio signal. The specified bandwidth Δ fkmget, for example, by splitting a given frequency band Δ fkfor M equal length and adjacent to each other on frequency.

A value of Pmpgcan be determined by the formula

where Rsend- the preset power value of the transmitted signal corresponding to a given range R of the base station 1; b<<1 is the set of non-negative value, for example b=0.

To exclude binary combination containing zeroes, you must fulfill the condition

When the conditions (4)-(6) reliable is the event consisting in the fact that at the entrance of each (k+1)-th base station 1 (figure 2) is not more than two radio signals transmitted in each specified frequency band Δ fkwith two k-x base station 1, located within distantly the t R actions of this (k+1)-th base station 1. Then taking into account the fact that different n correspond to different binary combinations reliable is the event consisting in the fact that there are some m-I band Δ fkmthat the k-e base station 1 transmits radio signals, they differ substantially in power, and therefore, the purpose of this m-th frequency band will be missing.

For example, at the entrance of the base station 118(2) operate the radio signals transmitted from base stations 117and 128in a given frequency band Δ f5. When N=60 log2N=5,91, where M=6. Then, the base stations 117and 128correspond to the binary numbers 010001 and 011100. Spectra of radio signals transmitted from base stations 117and 128and of signal current at the input of the base station 118conventionally depicted in figure 4 (range of signal current at the input of the base station 118that is given without weakening; the dashed line shows the spectrum in the frequency band in which the possible fading).

When placing the base station 1 with a random scatter around the tops of the conditional cells, representing equal right triangles, tightly attached to each other by their sides, densely covering the service area, or near the peaks of the conditional cells, representing an equal right pole the elbows, tightly attached to each other by their sides, densely covering the serviced territory, and subject to the conditions (4)-(6) reliable is the event consisting in the fact that at the entrance of each (k+1)-th base station 1 is also present at the same time not more than two radio signals transmitted from two k-x base station 1, located within a distance R of (k+1)-th base station 1 (see, e.g., patents for invention №2195776 and No. 2195777, bull. No. 34, dated 10.12.2002. The method of determining the location of a moving object/ Turkish AS, kupersmidt PV and other), and therefore, resting in the respective frequency bands will also be missing.

Since under the conditions (4)-(6) reliable is the event consisting in the fact that at the input of the second movable object 5 (figure 2) is also present at the same time not more than two radio signals transmitted in the same specified frequency range Δ fkwith the next k-x base station 1 within a distance R which is the second movable object 5, and taking into account the fact that different n correspond to different binary combinations reliable is the event consisting in the fact that there are some m-I band Δ fkmthat the k-e base station 1 transmits radio signals, they differ substantially in power, and follow the consequently, fading at reception on the second movable object 5 in this m-th frequency band will be missing.

Figure 5 shows an example of the system for the case where the number of base stations 1 equals fifteen. However, the description of the system operation in the implementation of the method described with regard to figure 2-4.

All items and blocks included in the system represented in figure 4-12 are known and described in literature.

The first receiving antenna 7, the first transmitting antenna 35, and the second transmitting antenna 40 and the second receiving antenna 41 are non-directional.

As a first microcontroller 25 and the second microcontroller 59 can be used in a microprocessor system with analog and digital inputs and outputs, which include a clock generator, memory devices, analog-to-digital and digital-analog converters, and other devices (see, for example, Horowitz, Whill. Art circuitry. - M.: Mir, 1993, s-295), not depicted in figure 5-12.

As the memory block 27, block 28 job and terminal unit 60 can be used any known and described in the literature digital input-output data (see, for example, Shevkoplyas BV Microprocessor structure. Engineering solutions. - M.: Radio and communication, 1993, p.27).

The propagation time of radio signals from each base the station 1 to the nearest base station 1 and the time interval measuring a power of a received radio signal is negligibly small compared to their length; the propagation time of the signal transmitting paths of the base station 1 is negligible.

Consider the implementation of the method using the system shown in figure 5-12, taking into account figure 2-4.

The gain of the first low-noise amplifiers 10 and the second low-noise amplifier 44 is set so that the sensitivity of the transponder 2 and the receiver 6 was equal to Pprmin. The gain of the first amplifier 34 power and the second amplifier 39 power is set so that the power of radio signals transmitted from base stations 1 and the first movable object 3, was equal to Rsend. All materials used in the system the signals are narrowband, energy spectra which are concentrated in the region of the operating frequency f. Then, taking into account the expression (3), the range of the transceivers 2 is equal to R, and the value R is set in accordance with the terms(4)-(6).

In block 28 the tasks of each transceiver 2 enter the number l of the specified frequency bands Δ f1=f0...f1that Δ f2=f1...f2, ... , Δ fl=fl-1...fl, ... , Δ fL=fL-1...fLradio signals transmitted from base stations 1, where l=1, 2, ... , L are positive integers, the number L+1 of a given frequency band Δ fL+1=fL...fL+1radio signals, the forehand is emich with the first movable object 3, non-repeating number n to the base station 1, where n=1, 2, ... , N. In this case (figure 2) L=3, N=60.

The binary sequence of pulses containing transmitted from the first mobile object 3 information from the output of the source 36 message transmitter 4 of the first movable object 3 is supplied to the first input of the fourth inverter 37 frequency, to the second input of which receives the harmonic signal of frequency fG4produced by the fourth local oscillator 38. Amplitude-shift keyed signal with the output of the fourth inverter 37 frequency is fed to the input of the second amplifier 39 power. The output signal of the second amplifier 39 of the power received at the input of the second transmitting antenna 40, which radiates into the space of the corresponding signal in the specified frequency band Δ fL+1.

The radio signal transmitted from the first mobile object 3, take the first base station 1, which is the base stations 1, within distance R which is the first moving object 3 (figure 2 first base stations 1 are the base station 134, 135, 144and 145).

In the transceiver 2 of each of the first base station 1, the outputs of the first receiving antenna 7 is fed to the input of the first bandpass filter 9 of the first block 8 group channel. The first band-pass filter 9 to ensure achival the selectivity image channel. The output signal of the first bandpass filter 9 is fed to the input of the first low-noise amplifier 10, the output of which is fed to the first input of the first Converter 11 frequency. On his second input signal harmonic signal of frequency fG1generated by the first local oscillator 12. The signal energy spectrum which is concentrated in the region of the intermediate frequency from the output of the first Converter 11 frequency is fed to the input of the first amplifier 13 intermediate frequency, the output of which is fed to the input of the second bandpass filter 15 of the first channels 14 processing.

Because with a given frequency band of transmission of the first movable object 3, is shifted along the frequency axis down to a frequency fG1the configuration of the first local oscillator 12, will only match the bandwidth of the second bandpass filter 15 (L+1)-th first channel 14 of the processing, the output signal from only the second bandpass filter 15 of this first processing channel 14 is supplied to the first input of the second Converter 16 frequency, to the second input of which receives the harmonic signal of frequency fT2generated by the second local oscillator 17. The spectrum of the signal current at the output of the second Converter 16 frequency coincides only with the bandwidth of the third bandpass filter 19 of one of the M second channels 18 processing (e.g., first). P is this the output of the third bandpass filter 19 of this second channel 18 of the processing is supplied to the respective switching input of the first analog switch 23 and to the input of the first unit 20 squaring, the output signal of which is fed to the input of the first integrator 21. The output signal of the first integrator 21 is fed to the input of analog-to-digital Converter 22, a binary output signal which corresponds to the power of a received radio signal, is fed to the corresponding inputs of the first microcontroller 25 (connected in series, the first unit 20 calculates the square and the first integrator 21 form a power meter - see, for example, Gandal, Aperol. Applied analysis of random data. - M.: Mir, 1983, p.143). The first microcontroller 25 decides whether the input of the transceiver 2 of the radio signal of the first movable object 3, and generates control signals to control inputs of the first analog switch 23, in which the first analog switch 23 connects the output of the third bandpass filter 19, the first of the M second processing channels (L+1)-th first channel 14 of treatment to the input of the first demodulator 24. The output signal of the first demodulator 24, which represents a binary sequence of pulses, is fed to the first switching input of the second analog switch 26. On the control inputs of the second analog switch 26 are signals generated by the first microcontroller 25, on which the second analog switch 26 connects the output of the first demodulator 24 to pen the th input of the third inverter 30 of each of the M modulators 29.

At the same time the first microcontroller 25 reads from the block 28 job number l=1 given frequency band for signals transmitted from the first base station 1 (as adopted by the radio signals are radio signals transmitted from the first mobile object 3 in a given frequency band Δ fL+1), and generates the control inputs of the third local oscillators 31 modulators 29 control signals, in which the third local oscillator 31 m-modulator 29 generates a harmonic signal of frequency f1m, which is the center frequency of the specified frequency band Δ f1mobtained by partitioning a given frequency band Δ f1for M equal length and adjacent to each other frequency intervals, where m=1, 2, ... , M are positive integers.

The first microcontroller 25 reads from block 28 task given the number n of the given base station 1 and generates a control input of the third analog switches 32 modulators 29 control signals corresponding to the binary representation of n, defined by (11). If am=1, the first microcontroller 25 generates the control input of the third analog switch 32 m-th modulator 29 control signal, whereby this third analog switch 32 connects the output of the corresponding third preobrazovatelya frequency to the corresponding input of the adder 33; if am=0, the first microcontroller 25 generates the control input of the third analog switch 32 m-th modulator 29 control signal, whereby this third analog switch 32 turns off the corresponding output of the third inverter 30 frequency from the corresponding input of the adder 33. The output signal from the adder 33 is fed to the input of the first amplifier 34 power, the output of which is fed to the input of the first transmitting antenna 35. The radio signal emitted from the first transmitting antenna 35 in the specified frequency band Δ f1represents the sum of signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ... , M are positive integers, defined on n.

The radio signals transmitted from the first base station 1, which is the base stations 1, within distance R which is the first moving object 3, take on second base station 1, located within a distance R of the operations of the first base station 1 (figure 2 second base stations 1 are the base station 124, 125, 136, 146, 155, 154,143,133).

In each transceiver 2 from the second base station 1, the outputs of the first at the me of the antenna 7 is fed to the input of the first bandpass filter 9 of the first block 8 group channel. The output signal of the first bandpass filter 9 is fed to the input of the first low-noise amplifier 10, the output of which is fed to the first input of the first Converter 11 frequency. On his second input signal harmonic signal of frequency fG1generated by the first local oscillator 12. The signal energy spectrum which is concentrated in the region of the intermediate frequency from the output of the first Converter 11 frequency is fed to the input of the first amplifier 13 intermediate frequency, the output of which is fed to the input of the second bandpass filter 15 of the first channels 14 processing.

Because with a given frequency band transmission transceivers 2 the first base station 1, is shifted along the frequency axis down to a frequency fG1the configuration of the first local oscillator 12, will only match the bandwidth of the second bandpass filter 15 of the first (l=1) of the first channel 14 of each of the second base station 1, the output signal from only the second bandpass filter 15 of this first processing channel 14 is supplied to the first input of the second Converter 16 frequency, to the second input of which receives the harmonic signal of frequency fT2generated by the second local oscillator 17. The output of the third bandpass filter 19 of each of the second channel 18 of the processing is supplied to the respective switching input of the first analog to the second switch 23 and to the input of the first unit 20 squaring, the output signal of which is fed to the input of the first integrator 21. The output signal of the first integrator 21 is fed to the input of the first analog-to-digital Converter 22, a binary output signal which corresponds to the power of a received radio signal, is fed to the corresponding inputs of the first microcontroller 25. The analysis of the signals acting on the respective outputs of all the first analog-to-digital Converter 22, the first microcontroller 25 decides whether the input of the transceiver 2 of the first radio base station 1, and generates control signals to control inputs of the first analog switch 23, in which the first analog switch 23 connects the output of the third bandpass filter 19 of one of the M second channel processing of the first (l=1) of the first channel 14 of treatment to the input of the first demodulator 24.

The radio signal transmitted from each of the first base stations 1, represents the sum of the signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ... , M are positive integers, defined by n. When the conditions (4)-(6) reliable is the event consisting in the fact that at the input of each second base station 1 (figure 2) is present on is also not more than two signals, transmitted in each specified frequency band Δ f1with two nearest first base station 1. In this regard, taking into account the fact that different n correspond to different binary combinations reliable is the event consisting in the fact that there are some m-I band Δ f1mthat the first base station 1 transmits radio signals, they differ substantially in power, and therefore, the purpose of this m-th frequency band will be missing expressions (11)-(13). So reliable is the event consisting in the fact that there is at least one of the M second channels 18 of the processing of the first (l=1) of the first channel 14 of the processing, the signal at the output of the third bandpass filter 19, which will be sufficient to handle the power. The output of this third bandpass filter 19, the first analog switch 23 connects to the input of the first demodulator 24.

The output signal of the first demodulator 24, which represents a binary sequence of pulses, is fed to the first switching input of the second analog switch 26. On the control inputs of the second analog switch 26 are signals generated by the first microcontroller 25, on which the second analog switch 26 connects the output of the first demodulator 24 to the first input of the third inverter 30 is of each of the M modulators 29.

At the same time the first microcontroller 25 reads from the block 28 job number l=2 given frequency band for signals transmitted from the second base station 1 (as adopted by the radio signals are radio signals transmitted from the first base station 1 in a given frequency band Δ f1), and generates the control inputs of the third local oscillators 31 modulators 29 control signals, in which the third local oscillator 31 m-th modulator 29 generates a harmonic signal of frequency f2m, which is the center frequency of the specified frequency band Δ f2mobtained by partitioning a given frequency band Δ f2for M equal length and adjacent to each other frequency intervals, where m=1, 2, ... , M are positive integers.

The first microcontroller 25 reads from the block 28 job also specified number n of the given base station 1 and generates a control input of the third analog switches 32 modulators 29 control signals corresponding to the binary representation of n, defined by (11). If am=1, the first microcontroller 25 generates the control input of the third analog switch 32 m-th modulator 29 control signal, whereby this third analog switch 32 connects the corresponding output of the third inverter 30 h is the frequency to the appropriate input of the adder 33; if am=0, the first microcontroller 25 generates the control input of the third analog switch 32 m-th modulator 29 control signal, whereby this third analog switch 32 turns off the corresponding output of the third inverter 30 frequency from the corresponding input of the adder 33. The output signal from the adder 33 is fed to the input of the first amplifier 34 power, the output of which is fed to the input of the first transmitting antenna 35. The radio signal emitted from the first transmitting antenna 35 in the specified frequency band Δ f2represents the sum of signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ... , M are positive integers, defined on n.

Then in the same way consistently, in all directions from the first base station 1 receive radio signals transmitted from the (k-1)-x base stations 1, for all k-x base stations 1 located within distance R of steps (k-1)-th base station 1, and k-e base station 1 are (k-2)-th base station 1, and transmits them to the specified frequency band not overlapping with the frequency band of radio signals transmitted from a (k-1)-x base stations 1, where k=3, 4, ... , K are positive integers. However, with useto the formula (7), if the band Δ fk-1radio signals received on the k-x base stations 1, coincides with a given bandwidth Δ fLthen set the band Δ fkradio signals transmitted from the k-x base stations 1, coincides with a given bandwidth Δ f1.

Radio transmission without loops is ensured by the fact that the first microcontroller 25 of each of the first base station 1 to the registration of the signals acting on the outputs (L+1)-th, the first (l=1) and second (l=2) the first channels 14 processing, generates a control input of the first analog switch 23 control signals on which the first analog switch 23 connects to the input of the first demodulator 24, the corresponding output (L+1)-th, but not the first (l=1) or second (l=2) of the first channel 14 processing; a first microcontroller 25 of each second base station 1 to the registration of the signals acting on the outputs of the first (l=1), the second (l=2) and third (l=3) the first channels 14 processing, generates a control input of the first analog switch 23 control signals on which the first analog switch 23 connects to the input of the first demodulator 24, the respective output of the first (l=1), but not the second (l=2) or third (l=3) of the first channel 14 of the handle; a first microcontroller 25 each k-th base station 1 to the result of the m reception signals, operating on the outputs (l-1)-th to l-th and (l+1)-th (l<L) the first channels 14 processing, generates a control input of the first analog switch 23 control signals on which the first analog switch 23 connects to the input of the first demodulator 24, the corresponding output (l-1)-th, but not l-th or (l+1)-th (l<L) of the first channel 14 processing, where l=3, 4, ... , L are positive integers, and the values of l and k are connected by the relation (7); if l=L, the first microcontroller 25 each k-th base station 1 to the registration of the signals acting on the outputs of the L-th, the first (l=1) and second (l=2) the first channels 14 processing, generates a control input of the first analog switch 23 control signals on which the first analog switch 23 connects to the input of the first demodulator 24 corresponding to the output of the L-rd, but not the first (l=1) or second (l=2) of the first channel 14 processing, where l=3, 4, ... , L are positive integers, and the values of l and k are connected by the relation (7).

In the receiver 6 of the second movable object 5, the outputs of the second receiving antenna 41, acting as a result of receiving radio signals transmitted from base station 1 within a distance R which is the second movable object 5, is fed to the input of the fourth bandpass filter 43 of the second unit group 42 of the channel.

Signal o is Yes fourth bandpass filter 43 is fed to the input of the second low-noise amplifier 44, the output signal of which is fed to the first input of the fifth inverter 45 frequency. On his second input signal harmonic signal of frequency fG1produced by the fifth local oscillator 46. The signal energy spectrum which is concentrated in the region of intermediate frequency, the output of the fifth inverter 45 frequency is fed to the input of the second amplifier 47 intermediate frequency, the output of which is fed to the inputs of the fifth bandpass filters 49 third channel 48 processing.

Since the second movable object 5 is within a distance R of several base stations 1 (but not more than four, see figure 2), with predetermined frequency bands of the transmission transceivers 2 of these base stations 1, is shifted along the frequency axis down to a frequency fG1the configuration of the fifth local oscillator 46, the same bandwidth corresponding fifth bandpass filters 49 third channel 48 processing. The output signal from the fifth bandpass filter 49 of each of the third data channel 48 of the processing is supplied to the first input of the sixth inverter 50 frequency, to the second input of which receives the harmonic signal of frequency fT2produced by the sixth local oscillator 51. The output signal of the sixth bandpass filter 53 of each of the fourth channel 52 of the processing corresponding to the third channel 48 of the processing goes on with the store switched input of the third analog switch 57 and to the input of the second block 54 squaring, the output signal of which is fed to the input of the second integrator 55. The output signal of the second integrator 55 is fed to the input of the second analog-to-digital Converter 56, a binary output signal which corresponds to the power of a received radio signal, is fed to the corresponding inputs of the second microcontroller 59. The analysis of the signals acting on the respective outputs of all of the second analog-to-digital Converter 56, the second microcontroller 59 decides whether the input of the receiver 6 of the radio base stations 1, within distance R which is the second movable object 5, and generates control signals to control inputs of the third analog switch 57, in which the third analog switch 57 connects the output of the sixth bandpass filter 53 of one of the M fourth processing channels 52 of the third channel 48 processing to the input of the second modulator 58.

The radio signal transmitted from each of base stations 1, within distance R which is the second movable object 5, is the sum of the signals transmitted in M specified non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ... , M are positive integers, defined by n. When this input is e of the second movable object 5 (2) is not more than two signals, transmitted in one specified band of frequencies from two nearby base stations 1. In this regard, taking into account the fact that different n correspond to different binary combinations, there will be some m-I band Δ fkmthat the first base station 1 transmits radio signals, they differ substantially in power, and therefore, the purpose of this m-th frequency band will be missing expressions (11)-(13). Thus, there is at least one of the M fourth processing channels 52 of the respective third channel 48 of the processing, the output signal of the sixth bandpass filter 53 which will be sufficient to handle the power. The output of this sixth bandpass filter 53, the third analog switch 57 connects to the input of the second demodulator 58. The output signal of the second demodulator 58, representing a binary sequence of pulses containing the information transmitted from the first mobile object 3, is fed to a corresponding input of the second microcontroller 59, which carries the output of this information in the terminal block 60.

The reception of radio signals transmitted from the first mobile object 3, it is possible directly on the second movable object 5, if it is within distance R of the first movable object 3. For this purpose, the receiver 6 of the second movable lens is 5 contains the (L+1)-th third channel 48 processing, which is similar to the work of other third channel 48 processing.

Upon completion of the transmission of information signals from the first movable object 3 per base station 1, and therefore, the second movable object 5, each base transceiver station 1 first microcontroller 25 generates a control input of the second analog switch 26 control signals by which the second analog switch 26 disconnects the output of the first demodulator 24 from the third inputs of the converters 30 frequency of each of the M modulators 29.

Used in the description of the formulas can meet the following system parameters: N=60; K=14; L=3; d=R=300 m; Psend=10-3W; Pprmin=10-11W; T=0.02 s; the transmission rate information from each base station 1 and the first movable object 3 is not more than 512 bit/s; preset frequency band of radio signals transmitted from the base station 1 in accordance with table; the specified frequency band of radio signals transmitted from the first mobile object 3 is 900,3... 900,4 MHz.

Thus, a rational distribution of base stations does not require the use of fiber optic communication lines and definition in the switching center base station within range which is second movable object that simplifies the way. In addition, the assignment of the bands of radios is gralow, transmitted from base stations in accordance with the distance of the base station from the first mobile object, does not require the introduction of additional base stations by, for example, to reduce the power level of the radio signals, time-consuming presadenia frequency bands of radio signals transmitted from each base station, which also simplifies the method.

Table
klΔ fkMHzklΔ fkMHz
11900,0... 900,182900,1... 900,2
22900,1... 900,293900,2... 900,3
33900,2... 900,3101900,0... 900,1
41900,0... 900,1112900,1... 900,2
52900,1... 900,2123900,2... 900,3
63900,2... 900,3131900,0... 900,1
71900,0... 900,1142900,1... 900,2

1. The method of radio communication between mobile objects, which consists in the fact that place the base station with predetermined ranges of validity, transmit signals on the first movable object, which take on the first base stations within range of actions which is the first moving object, and convert the signals that pass from the base stations, these signals take the base stations within range which is second movable object, and is converted into radio signals, which is transmitted from the base stations and take the second movable object, characterized in that the placement of base stations is performed with the specified mathematical expectation and variance of the distance between the nearest base stations, signals, convert the signals received at the base stations within range of actions which is the first moving object, are radio signals, and transmitting the radio signals from the base stations to the base station, within the ranges of Astia which is second movable object, is that receive radio signals transmitted from the first base station, which base station within range of actions which is the first moving object, at the second base stations located within the ranges of validity of the first base station, and transmit them in a given frequency band not overlapping with the frequency band of radio signals transmitted from the first base station, then in the same way consistently, in all directions from the first base stations receive radio signals transmitted from the (K-1)-th base stations, on all k-x base stations within the ranges of steps (K-1)-th base stations, and the k-th base stations are not (K-2)-th base stations, and transmit them in a given frequency band not overlapping with the frequency band of radio signals transmitted from a (K-1)-th base stations, where k=3,4, ..., K are positive integers, and the specified frequency band of radio signals transmitted from the first base station is a first specified frequency band set by the frequency band of radio signals transmitted from the second base station is the second specified frequency band set by the frequency band of radio signals transmitted from the k-x base stations, is k-I specified frequency band, where k=3, 4, ..., K are positive integers, and first what I specified frequency band, the second specified frequency band, 1-I specified frequency band, where 1=3, 4, ... L are positive integers, 3≤L≤K, are non-overlapping k-th specified frequency band, where k=3, 4, ..., K are positive integers, coincides with the 1st a given frequency band when the condition 1=k-L [k/L], where [k/L] is the largest integer that does not exceed k/L.

2. The method according to claim 1, characterized in that the radio signals transmitted in each specified frequency band with the n-th base station, where n=1, 2, ..., N are positive integers, N is the number of base stations, represent the sum of the signals transmitted in M the set of non-overlapping frequency bands, where M>log2N, and the power of the signal transmitted in the m-th predetermined band of frequencies, where m=1, 2, ..., M are positive integers, determine n.



 

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2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object and destroyed upon completion of radio communications between mobile and stationary objects. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications engineering; digital communications in computer-aided ground-to-air data exchange systems.

SUBSTANCE: proposed system designed to transfer information about all received messages irrespective of their priority from mobile objects to information user has newly introduced message processing unit, group of m modems, (m + 1) and (m + 2) modems, address switching unit, reception disabling unit whose input functions as high-frequency input of station and output is connected to receiver input; control input of reception disabling unit is connected to output of TRANSMIT signal shaping unit; first input/output of message processing unit is connected through series-connected (m + 2) and (m + 1) modems and address switching unit to output of control unit; output of address switching unit is connected to input of transmission signal storage unit; t outputs of message processing unit function through t respective modems as low-frequency outputs of station; initialization of priority setting and control units, message processing unit clock generator, and system loading counter is effected by transferring CLEAR signal to respective inputs.

EFFECT: enhanced efficiency due to enhanced throughput capacity of system.

1 cl, 2 dwg

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

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