SU1283827A1 - Method and apparatus for transmission and reception of signals - Google Patents

Abstract

The proposed method of transmitting and receiving signals and the device for its implementation are in the field of information-measuring equipment and can be used in the construction of information-measuring systems, as well as communication systems and remote control. The method of transmitting and receiving signals, in which the signal and signal transmitted through the channel are formed at the transmitting and receiving sides, and the transmitted signals are determined by the difference between the input signal and the formed signal evaluation, in order to increase the noise immunity (to the transmitted signal difference, the k-th part of the estimate, recorded on the transmitting side, is added, and before the signal is restored on the receiving side, the same part of the reconstructed signal is subtracted from the received signal The device contains an adder, a coder, a decoder and an estimator on the transmitting side and is different in that, in order to improve noise immunity, an adder and a divider are entered on the transmitting side, and a cyMivsaTop and a divider on the receive side. the square of the error in signal recovery due to failures in the communication channel. The gain depends on the type of interference and the method of forming the estimate. When forming the evaluation of the signal with. With the help of a zero order predictor and fluctuation disturbances, the error can be reduced by more than 20 times. 2 sec. f-ly, 1 ill.

Description

The invention relates to an information-measuring technique and a mocket to be used in information transmission systems with amplitude-pulse modulation,

The purpose of the invention is to improve noise immunity.

The drawing shows a functional diagram of the device.

The device contains on the transmitting side 1 the first adder 2, the encoder 3 comparison unit 4, the second adder 5, decoder 6, divider 7, communication channel 8 On the receiving side 9, the device contains decoder 10, adder 11j comparison unit 2 and divider 13.

The interference resistance in the method and the device is achieved by transmitting over the channel. Information about the absolute value of the signal estimate on the transmitting side in the form of its K-th part, which then on the receiving side is compared with K-part of the recovered signal and on the basis of the result of the comparison is introduced correction in the shaper of the recovered signal.

With this technical solution, there are no anomalous errors due to distortion of samples in the cannabis. connection, characteristic of the method and device with the transmission of the absolute values of the signal 9, since the dynamic range of the transmitted signal practically does not expand (for the optimal case, the part is one hundredth of the input signal) and on the other - the transfer, the K-th part of the absolute value the signal avoids the accumulation of error.

The device works with, pedaling way. I

Upon arrival of the clock on the transmitting side 1, the signal from adder 2j in which the input signal 5 is added from divider 7 and the subtraction of the signal from the 4 block of the C1 comparison is encoded in encoder 3 and enters communication channel 8 together with the clock sync pulses encoder 3 is also fed to the decoder input b where it is decoded, then in the adder 5 the signal from divider 7 is subtracted from it and thus obtained the difference between the input signal and the signal from the output of the comparison unit (taking into account the norpeini ™ of coding and decoding operations) Ani) is recorded in the comparison unit 4 to generate estimates at the next time interval until the arrival of the next sync pulse.

On receiving side 9 signal from

The communication channel 8 is decoded by the UR decoder to the input of the adder 115 where the signal of the divider 13 is subtracted from it, then recorded in the comparison block 12 to form an estimate of the signal in the next time interval. The recording occurs at the moments of arrival — the sync pulses from decoder 6, which separates them from the channel sprinkling.

Claims (2)

1. A method of transmitting and receiving signals based on forg on the transmitting side, from the original analog-signal of amplitude-pulse modulation with subsequent conversion into a difference modulated FBD signal and its transmission over the communication channel, receiving the difference modulated signal and its restoration to the original analog signal, T l and h and y and u so that, in order to increase the noise immunity, the frequency on the transmitting side of the amplitude of each pulse of a modulated signal increases by a specified part of the amplitude of the amplitude pulse signal at the same time S on the receiving side from the amplitude of the received pulse of that difference modulated signal See the same part of the amplitude the reconstructed original analogue signal at the appropriate time, 2. A device for transmitting and receiving signals, containing on the transmitting side a first adder, the output of which is connected to the first input of the encoder, is connected to the communication line and the first input of the decoder, comparison unit} whose output is connected to the first input of the first adder, the first input of the comparison unit and the second inputs of the encoder and decoder are connected to the clock bus, the second input of the first adder is an input of the device on the receiving side; zi j the first decoder output is connected 31 with the first input of the comparison unit, the output of which is the output of the device, characterized in that, in order to improve the noise immunity, the second adder and divider on the transmitting side of the viadin are connected to the first input of the second adder, the output of which is connected to the second input of the block compare, you 838274 the comparison unit stroke through a divider is connected to the second input of the second adder and the third input of the first adder, 5 adder and divider are entered on the receiving side, second BU: HCD decoder is connected to the first input of the adder, the output of which is connected to the second input of the comparator unit, the output of which is through the divider fO is connected to the second input of the adder.