Method of transmitting information signals and apparatus for realising said method

FIELD: radio engineering, communication.

SUBSTANCE: information 1 consisting of five pulses is encoded in form of a series of one positive pulse, two positive pulses, each magnified N times, one negative pulse magnified N times and one positive pulse, and an information 0 consisting of five pulses is encoded in form of a series of one negative pulse, two negative pulses, each magnified N times, one positive pulse magnified N times and one negative pulse, wherein N is a positive number greater than 1; the obtained sequences are transmitted to a data transmitting medium, and the received signal is compared with a reference signal by cross-correlation at the receiving side.

EFFECT: obtaining a clear signal with high level of interference and longer range of signal transmission.

2 cl, 5 dwg

 

The invention relates to methods for encoding, decoding and converting the code to detect errors and correct them, namely, to improve noise immunity.

There is a method of encoding using Barker sequence of (theory of the telecommunications. Textbook for higher educational institutions under the editorship of Prof. DOS. - M.: Radio and communication, 1998. - S-365), including the encoding information of zero and three - and five-element sequence with the subsequent transfer of these sequences in the data environment. Received signals are compared with a reference by vzaimosohranenii, from the function of vzaimosohranenii concludes acceptance signal estimate of the received signal is the ratio of the main peak and the side lobes as a function of vzaimosohranenii.

The disadvantage of this method is the inability to obtain a level the main peak is greater than the number of elements in the sequence.

Known for consistent filter (theory of the telecommunications. Textbook for higher educational institutions under the editorship of Prof. DOS. - M.: Radio and communication, 1998. - S-365), which includes a delay line, fotosobraniya and thatinvestors cascades summarizing the device.

The disadvantage of this device is the inability to detect an information signal at a high level of interference.

WPI the walls of the encoding method using the pulse sequence (EN 2460211, IPC NM 13/00, IPC G06F 17/15. The method of transmission of information signals and a device for its implementation. - Publ. 21.08.2012. Bull. 24), including the encoding information of zero and five-element sequence with the subsequent transfer of these sequences in the data environment. Received signals are compared with a reference by vzaimosohranenii, from the function of vzaimosohranenii concludes acceptance signal estimate of the received signal is the ratio of the main peak and the side lobes as a function of vzaimosohranenii.

The disadvantage of this method is that the signal can be transmitted over a limited distance.

The aim of the invention is to obtain a clear signal with a high noise level and increase the transmission distance of the signal.

This goal is achieved by the fact that in the Barker sequence is injected pulses with increased N times the energy level.

The invention according to claim 1 is that the encoding of the information units of the five pulses are produced in a sequence of one positive, two positive, increased N times each, one negative, increased N times, and one positive pulse and the encoding information of the zero of the five pulses are produced in a sequence from one negative, dwugodzinnych, increased N times each, one positive, increased N times, and one negative pulse, and N is a positive number greater than one, pass the thus obtained sequence in the data environment, and on the receiving side to produce a comparison signal with the reference by vzaimosohranenii, and the invention according to claim 2 is that on the transmission side injected three of the amplifier, the first input I is connected to the cascade that generates a second pulse pyatikursnika signal output to a summing device, the second input II is connected to the cascade forming a third pulse pyatikursnika signal, output to a summing device, the input of the third III is connected to the cascade forming a third pulse pyatikursnika signal output to a summing device, and the first and fifth cascades pyatikursnika signal outputs are directly connected to a summing device connected through the medium of data transfer with the host country on the receiving side enter the four amplifiers IV, five V and six VI, the fourth IV is connected to the cascade that generates a second pulse pyatikursnika signal output to a summing device, the fifth input V is connected to the cascade forming a third pulse pyatikursnika signal output to summiruemosti, the sixth input VI is connected to the cascade forming the fourth pulse pyatikursnika signal output to a summing device, and the first and fifth cascades pyatikursnika signal outputs are coupled directly to the summing device forming the output signal.

Figure 1 presents information unit in a proposed five-element sequence consisting of two 1 and 5 positive pulses, two 2 and 3 positive pulses, increased N times each, and one 4 negative pulse is increased N times, and figure 2 presents the intercorrelation function of this sequence in the form of the main peak 6 and side lobes.

Figure 3 presents zero information in the form of a proposed five-element sequence consisting of two 1 and 5 negative pulses, two 2 and 3 negative impulses, increased N times each, and one 4 positive pulse is increased N times, and figure 4 shows the intercorrelation function of this sequence in the form of the main peak 6 and side lobes.

Figure 5 presents a diagram of the device for implementing the method of transmission of information signals, comprising a transmitting side 7 and the receiving side 8, which consists of delay lines, respectively, 9 and 10 with fotosobraniyami and phase-inverted cascades 11, 1, 13, 14, 15 on the transmission side and 16, 17, 18, 19, 20 at the receiving, transmitting parts to stages 12, 13 and 14 are connected to the amplifiers 21, 22 and 23, and in the receiving part 8 of the same stages 17, 18 and 19 are connected to the amplifiers 24, 25 and 26, and the outputs of the amplifiers 21, 22, 23 are connected to the input of summing device 27, and the outputs of the amplifiers 24, 25 and 26 to the input of summing device 28.

The proposed method of information transfer is carried out as follows.

On the transmission side information of zero and five element encoded signal representing a modified signal Barker, whose second pulse 2, the third pulse 3 and the fourth pulse 4 have increased, for example, 5 times the energy levels (1, 3), or increased N times, and at the receiving side is usayvarlesia received signals with the reference signals. By intercorrelation functions, the conclusion about the presence or absence of a received information signal, which is determined by the ratio of the Central peak 6 and side lobes as a function of vzaimosohranenii (2, 4).

If vzaimosohranenii proposed sequence of pulses of the difference between the Central peak 6 and the lateral petals significant, this difference is significantly greater than the increased energy of the transmitted information signal.

ELUVEITIE energy of all pulses of the five element sequence Barker, that is all the information signal, for example five times, then the value of the main peak will increase five times. However, the costs of energy transfer also increase five times.

In the proposed sequence of increasing energy three pulses five times (1, 3) leads to an increase of the main peak at 15.4 times (2, 4), and the energy costs of transmission increased only 3.4 times. As the five element sequence Barker gives a main peak 5, and the proposed sequence gives a main peak of 77, the increase of the main peak is 15.4 times, while the energy consumption for transmission is five-element Barker sequence is 5 units, and energy costs for the submission of the proposed five-element sequence consists of 17 units, i.e. energy costs increase by 3.4 times.

In the proposed sequence, the ratio of the main peak to the energy consumption for sending a sequence of pulses is greater, the greater the number N.

Using the proposed sequence signal-to-noise ratio in the medium ceases to be relevant on the receiving side, which is focused on a specific waveform and its parameters, as a hindrance, as a random variable cannot have parameters of the transmitted signal even for the duration odnoyoimennoj package.

The proposed device operates as follows.

On the transmission side 7 of the input signal to the delay line 9, which is supplied to fotosobraniya and phase-inverted cascades, where a signal is generated with pulses necessary positive and negative polarity. The pulses from the outputs 12, 13 and 14 come to the amplifiers 21, 22 and 23, then these pulses, and the pulses from the outputs 11, 15, are summed in a summing device 27 and sent to the data transfer medium. On the receiving side 8 pulses fed to the delay line 10, and the pulses from the outputs 17, 18 and 19 come to the amplifiers 24, 25 and 26. The pulses from the outputs of the delay lines 16, 20 and amplifiers 24, 25 and 26 are received in the summing device 28, forming the output signal.

Thus, the proposed method and device for transmission of information signals can achieve much higher main peak of the intercorrelation function with increasing energy of the three pulses of the five, and not all five pulses. A higher main peak of the mutual correlation function of the received signal makes it easier to identify him among the noise and to transmit a signal over a greater distance.

1. The method of transmission of information signals, including encoding information unit of the five pulses in a sequence of one positive uvlechennogo N times one positive, one positive, one negative and one positive pulse, the encoding information of the zero of the five pulses in a sequence from one negative, increased N times one negative, one negative, one positive and one negative pulses, the transmission of the received sequences in the data environment, and on the receiving side to produce a comparison signal with the reference by vzaimosohranenii, characterized in that the encoding of the information units of the five pulses are produced in a sequence of one positive, two positive, increased N times each, one negative, increased N times, and one positive pulses and encoding information of the zero of the five pulses are produced in a sequence from one negative, two negative, increased N times each, one positive, increased N times, and one negative pulse, and N is a positive number greater than one, pass the thus obtained sequence in the data environment, and on the receiving side to produce a comparison signal with the reference by vzaimosohranenii.

2. Device for transmission of information signals, in which with a transmitting and receiving sides, delay lines, phase-inverted and fotosobraniya cascades, one amplifier on the transmitting and the receiving side, a summing device, the data transfer medium, characterized in that on the transmission side injected three of the amplifier, the first input I is connected to the cascade that generates a second pulse pyatikursnika signal output to a summing device, the second input II is connected to the cascade forming a third pulse pyatikursnika signal output to a summing device, the input of the third III is connected to the cascade forming a third pulse pyatikursnika signal output to a summing device, and the first and fifth cascades pyatikursnika signal outputs are directly connected to a summing device connected through the medium of data transfer with the host country on the receiving side enter the four amplifiers IV, five V and six VI, the fourth IV is connected to the cascade that generates a second pulse pyatikursnika signal output to a summing device, the fifth input V is connected to the cascade forming a third pulse pyatikursnika signal output to a summing device, a sixth input VI is connected to the cascade forming the fourth pulse pyatikursnika signal output to a summing device, and the first and fifth cascades pyatikursnika signal outputs are connected to the right near St the public with summing device, forming an output signal.



 

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