Line radio photomanipulating pss

 

(57) Abstract:

Line radio photomanipulating PSS (noise-like signal) refers to the transmission of discrete information and can be used in the radio space and terrestrial communication systems using pseudonoise signals. Technical result achieved - increasing volume of information transmitted twice. Line radio photomanipulating PSS contains two sources of information, a pulse-width modulator, phase modulator, balanced modulator, power amplifier, two FM generator, the generator carrier frequency, two synchronizer, transmitting and receiving antennas, six mixers, intermediate frequency amplifier (if amplifier), the correlator, the demodulator, two recipients of the information, heterodyne, six bandpass filters, five electronic keys, the adder, encoder, switch, recirculator, the frequency-time matrix, reference generator, and a decoder. 4 Il.

The invention relates to the field of discrete information transmission and can be used in radio channels to transmit information in space and terrestrial communication systems using pseudonoise signals - PSS.

Known communication systems is the disadvantage of this system is the low immunity in conditions of interference with a concentrated range, due to neoptimalizovat algorithm signal processing with respect to such interference.

Also known broadband communication system with PSS (see L. E. Varakin "communication Systems with noise-like signals", M, "P and C", 1985, page 16, Fig. 1, 7), intended for the transmission of discrete messages. Since this device is a consistent filter, this unit is practically possible only incoherent reception of orthogonal signals that lead to low noise immunity information, because the higher the immunity provided for coherent reception and use of out-of-phase signals. In addition, the practical implementation of the agreed filters with large bases of the signal represents a technical challenge.

The closest to the technical nature of the proposed facility is a line of communication with photomanipulating PSS, given in the book by L. E. Varakin "communication Systems with noise-like signals". M, P and C, 1985, page 18, Fig. 1, 9, adopted for the prototype.

Functional diagram of the device of the prototype is shown in Fig. 1, where we have introduced notation.

1 - source of information;

2 - latitudes is

6 - generator FM;

7 - generator carrier frequency;

8 - synchronizer;

9 - transmitting antenna;

10 - reception antenna;

11 - mixer;

12 - the intermediate frequency amplifier (if amplifier);

13 - correlator;

14 - demodulator;

15 - recipient information;

16 - heterodyne;

17 - generator FM;

18 - synchronizer.

The device prototype has the following functional relationships. The transmitting device connected in series source 1, a pulse-width modulator 2, the phase modulator 3, the balanced modulator 4 and the amplifier 5, the output of which is connected to the transmitting antenna 9, the second input of the pulse-width modulator 2 is connected to one of the outputs of the synchronizer 8, the second output through the FM generator 6 is connected to a second input of the phase modulator 3, and the output of the generator carrier frequency 7 is connected to a second input of the balanced modulator 4. Receiving device: receiving antenna 10 is connected to one of inputs of the mixer 11, the second input of which is connected to the output of the generator 16, an input connected to the first output of the synchronizer 18, the output of mixer 11 through the amplifier 12 is connected to one of inputs of the correlator 13, the output of which through demodulator FM 17, the output of which is connected with the second input of the correlator 13, the third input of which is connected to the third output of the synchronizer 18 and the second input of demodulator 14, and a clock input 18 is connected to the output of the correlator 13.

Function prototype as follows.

Phone message (Fig. 2A) from the information source 1 is fed to the input pulse-width modulator 2. Output PWM signal (Fig. 2B) is input to the phase modulator 3, to the second input of which is supplied FM PSS (Fig. 2B) generated by the generator FM 6. Photomanipulating the output signal of the phase modulator 3 (Fig. 3G), containing the information fed to the input of balanced modulator 4, which is balanced modulation of the oscillations of the carrier frequency from the generator carrier frequency 7. Then amplified by the power amplifier 5 of the FM signal through the antenna 9 is radiated into space. Work articulated pulse modulator 2 and the generator FM signal 6 controls the synchronizer 8, which produces the required frequency and control signals.

In the receiver adopted by the receiving antenna 10, the signal supplied to the mixer 11, where with the help of the local oscillator 16 is transferred to an intermediate frequency and of th the 13 is supplied reference signal generator FM 17 in the form of FM PSS (Fig. 2B) and in the correlator 13 is optimal processing of the received signal. At the output of the correlator 13, thus, the voltage contains a phone message in the form of a PWM signal, which is then fed to the input of the demodulator 14 and the output of which received a phone message is transmitted to the receiver 15. The operation of the receiver as a whole and its separate units (local oscillator 16, the FM generator 17, the correlator 13, the demodulator 14) controlled by the synchronizer 18, which first searches for FM PSS in time and frequency, and then maintains synchronism.

The disadvantage of this device prototype is insufficient bandwidth information.

To increase throughput information in the device containing on the transmission side is connected in series source of information, a pulse-width modulator, phase modulator and balanced modulator synchronizer, one output of which is connected with the second input pulse-width modulator, and the second output of the synchronizer through the FM generator connected to the second input of the phase modulator, the output of the generator carrier frequency is connected with the second input of the balanced modulator and the power amplifier output to elator, the demodulator and receiver information, synchronizer, one of the outputs through which the local oscillator is connected to a second input of the mixer, the second output of the synchronizer through the FM generator is connected with the second input of the correlator, a third input connected to the third output of the synchronizer and the second input of the demodulator, the output of the correlator, in addition, is connected to the clock input entered on the transmission side five mixers, signal inputs of which are connected with the output of the balanced modulator, and heterodyne inputs of these mixers are connected respectively with the five outputs of the encoder inputs are connected to the output of the second source of information, the five outputs of the mixers through the respective band-pass filters are connected to signal inputs corresponding to the five key controlled inputs of which are connected to the five outputs of the switch, respectively, an input connected to the sixth output of the encoder, and the key outputs connected to respective inputs of the adder, the output of which is connected to the input of the amplifier; at the receiving side input bandpass filter is connected to the output of the correlator and the output through the recirculator is connected to the input time-frequency matrix, toe who was the recipient of the information reference oscillator, the output of which is connected to one of inputs of the recirculator, two clock input of which is connected respectively to the two outputs of the synchronizer.

In Fig. 4 shows a functional diagram of the device where the above symbols.

From the 1st to the 18th designations are the same as in the device prototype.

On the transmission side:

191- 195- mixers;

201- 205- bandpass filters;

211- 215keys e;

22 - adder;

23 - encoder;

24 - switch;

25 - second information source;

At the receiving side:

26 - bandpass filter;

27 - recirculator;

28 - frequency-time matrix;

29 - reference oscillator;

30 - decoder;

31 is the second recipient of the information.

The proposed device has the following functional relation.

The transmitting device, connected to the first information source 1, a pulse-width modulator 2, the phase manipulator 3 and the balanced modulator 4, the output of which is connected to the five inputs of the mixers 191- 195second inputs of which are connected respectively with the five outputs of the encoder 23, WMO is cut corresponding bandpass filters 201- 205connected to signal inputs of the respective keys 211- 215managed the inputs of which are connected to the five outputs of the switch 24, respectively, and the output of switch 24 is connected to the sixth output of the encoder, the outputs of the keys 211- 215connected to respective inputs of the adder 22, the output of which through the amplifier 5 is connected to the transmitting antenna 9. Second input of the balanced modulator 4 is connected to the output of the generator carrier frequency 7, and the second input of the pulse-width modulator 2 is connected to the output of the synchronizer 8, the second input is through the FM generator 6 is connected to a second input of the phase modulator 3.

The receiving device, connected to the mixer 11, amplifier 12, the correlator 13, the demodulator 14 and the first receiver 15, the signal input of the mixer 11 is connected to the receiving antenna 10, the output of the correlator 13, moreover, is connected to the input of the synchronizer 18 and through the band-pass filter 26 to one of the inputs of the recirculator 27, a second input connected to the output of the reference oscillator 29, two clock input of the recirculator 27 are connected respectively to the two outputs of the synchronizer 18, the third entrance through which the local oscillator 16, the connection is at the input of the correlator 13, a third input connected to the second input of the demodulator 14 and the fifth input of the synchronizer 18. The output of the recirculator 27 is connected to the input time-frequency matrix 28, five outputs which are connected respectively with the five inputs of the decoder 30, the output of which is connected to the input of the second receiver 31.

The proposed device is as follows.

Phone message (Fig. 2A) from the first information source 1 is fed to the input articulated pulse modulator 2. With the PWM output 2 signal (Fig. 2B) is input to the phase modulator 3, to the second input of which is supplied FM PSS (Fig. 2B) generated by the generator FM 6. Photomanipulating the output signal of the phase modulator 3 (Fig. 3G), containing the information fed to the input of balanced modulator 4, which is balanced modulation of the oscillations of the carrier frequency from the generator carrier frequency 7. From the output of the balanced modulator 4, the signal input to the mixer 191- 195.

From the second information source 25 to the input of the encoder 23 is fed the second information in the form of a binary digital code 25. The encoder 23 is coding information. For example, zactima information may prinr frequencies, available as part of the encoder generates, respectively, five frequency f1f2f3f4and f5that with the five outputs of the encoder 23 can be transferred to the second (heterodyne) inputs of the mixers 191- 195. Moreover, in the interval duration signal from 0 to T from the output of the synthesizer is supplied to only one of the five frequencies depending on the transmitted information. The beginning and duration of periods of information signals transmitted from first and second sources of information must be the same.

The signal from the outputs of the mixers 191- 195through the respective band-pass filters 201- 205is fed to the signal inputs of the respective keys 211- 215. To the input of the switch 24 from the encoder 23 is supplied encoded information, for example, 10000, 01000, 00100, 00010, 00001 depending on the transmitted information.

Switch on the five outputs appropriately manages the keys 211- 215. For example, if the switch has been switched 10000, then opens the first key 211if - 01000, it opens the second key 212and so on

From the outputs of the keys 211- 215the signal through the adder 22 is supplied to the amplifier 5, g is ninety antenna 10, the signal supplied to the mixer 11, where with the help of the local oscillator 16 is transferred to an intermediate frequency and after the amplifier 12, where it is amplified to the required size, is fed to the correlator 13, which consists of a multiplier and integrator. To the second input of the correlator 13 is supplied reference signal generator FM 17 in the form of FM PSS (Fig. 2B) and in this correlator is the optimal processing of the received signal. At the output of the correlator 13, thus, the voltage contains a phone message in the form of a PWM signal, which is then fed to the input of the demodulator 14 and the output of which received a phone message is transmitted to the first receiver 15.

The output signal from the correlator 13, moreover, is fed to the bandpass filter 26. The bandwidth of this filter should be equal to the frequency range f1- f5based on the frequency of the transmitter, plus the instability frequency of the transmitter and receiver, that is,

f = funder+fsend+fPfP,

From the output of bandpass filter 26, the signal at the recirculator 27, which is the accumulation of the signal. The frequency shift for a rebreather is equal to the bandwidth of the broadband filter f and is equal to the frequency of the reference oscillator.

The delay time of the delay line of a rebreather must be equal toSS="ptx2">

In the time period from 0 to T, there is only one frequency f1f2f3f4f5. At the end of the repetition period of the signal from the synchronization unit 18 receives a pulse reading Uwith(see Fig. 3A) and is followed immediately by pulse blanking Ug(see Fig. 3b). Rear front Uwithcoincides with the front front Ug. Duration Uwithand Ugare equal and equal to the length of the delay lineLZrecirculator.

After the action of Ugis zeroing recirculator 27. Next cycle of accumulation is repeated. Thus, the recirculator is a block in which there is an accumulation of signals with frequencies f1f2f3f4and f5. Depending on the transmitted frequency of the ensemble over f1- f5the position of the convolution of the signal in the Uwithwill change. Thus, if the transmitted frequency f1it will correspond to the interval 1 (see Fig. 3G) - UC1- pulse reading Uwith(Fig. 3b), if passed f2then the two interval UC2and so on

The frequency-time matrix 28 converts the time interval UC1- UC5in the code (Fig. 3D, e, ... e).

And then the decoding unit 30 generates stesnitelnaia complication allows you to double the amount of transmitted information.

Line radio photomanipulating PSS containing on the transmission side connected in series to the first source of information, a pulse-width modulator, phase modulator and balanced modulator synchronizer, one output of which is connected with the second input pulse-width modulator, and the second output of the synchronizer through the FM generator connected to the second input of the phase modulator, the oscillator carrier frequency output is connected to a second input of the balanced modulator and the power amplifier, the output of which is connected to a transmitting antenna at the receiving side is connected in series mixer, if amplifier, the correlator, the demodulator and the first recipient of the information, receiving antenna is connected to the input of the mixer, the synchronizer, one of the outputs through which the local oscillator is connected to a second input of the mixer, the second output of the synchronizer through the FM generator is connected with the second input of the correlator, a third input connected to the third output of the synchronizer and the second input of the demodulator, the output of the correlator, in addition, connected to the input synchronizer, wherein imposed on the transmission side five mixers, signal inputs of which are connected together and the DAMI encoder, input of which is connected to the output of the second source of information, the five outputs of the mixers through the respective band-pass filters are connected to signal inputs corresponding to the five key controlled inputs of which are connected to the five outputs of the switch, respectively, an input connected to the sixth output of the encoder, and the key outputs connected to respective inputs of the adder, the output of which is connected to the input of the amplifier; at the receiving side - band-pass filter, whose input is connected to the output of the correlator and the output through the recirculator - with the input of the time-frequency matrix, five outputs which are connected respectively with the five inputs of the decoder, the output of which is connected to the input of the second information receiver reference oscillator, the output of which is connected to one of inputs of the recirculator, two clock input of which is connected respectively to the two outputs of the synchronizer.

 

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