SU1163485A1 - Device for reception of generalized telegraph signals - Google Patents

Abstract

A DEVICE FOR RECEPTION OF A GENERALIZED TELEGRAPH SIGNAL, containing a comparison unit, the outputs of which are connected to the inputs of the output matching unit, and in each channel a unit of formation of constants, the output of which is connected to the first input of the first adder, the output of which through the first amplifier is connected to the first input of the main multiplier, output which is connected to the first input of the second adder, the output of which is connected to the input of the integrator, the output of which is connected to the second input of the main multiplier, and the second amplifiers Which are connected to the second inputs of the second adder, characterized in that, in order to increase the reception speed, a mode switch, a memory block, an optimal interpolation unit, a delay line, additional adders, and s each channel - additional blocks are entered into it formation of constants, additional first adders, additional first amplifiers, additional multipliers and a third amplifier, the outputs of which are connected to the third input of the second adder, the first additional inputs of which connect There are no extra multiplier outputs, the first inputs of which are connected to the outputs of additional first amplifiers, whose inputs are connected to the outputs of the first additional sums of tori, the first inputs of which are connected to the outputs of additional constants forming units, while the second inputs of the first adders are connected to the additional output outputs (L tori, the inputs of which are connected to the second inputs of the main and additional attenuators to the input of the third amplifier, to the output of the integrator and to the first inputs of the switch modes. The control outputs of which are connected to the inputs of the second amplifiers. The first outputs of the switch. The operating times are connected to the inputs of the memory block, the outputs of which are connected to the second inputs of the mode switch. SPMs of operation, the second outputs of which are connected to the inputs of the optimal interpolation block. The outputs of which are connected to the third inputs of the operation mode switch, the third outputs of which are connected to the inputs of the comparison unit, and the outputs of the delay line are connected to the third inputs of the main and additional terminals. nice clever inhabitants.

Description

The invention relates to telegraph communication and may be used in telecommunication systems.

The purpose of the invention is to increase the reception speed.

The drawing shows a structural electrical circuit of the proposed device.

. A device for receiving a generalized telegraph signal contains blocks 1 of the formation of constants., Additional blocks 2 of the formation of constants, the first adders 3, additional first adders 4, the first amplifiers

5, additional first amplifiers

6, main multipliers 7, additional multipliers 8, second adders 9, integrators 10, second amplifiers 11, third amplifiers 12, line

13 delays, additional adders 14, comparison unit 15, switch of operation mode 16, memory block 17, optimum interpolation block 18, and output matching block 19.

The device works as follows.

The device operates in three modes, one after the other and set by the position of the switch 16 operating modes: optimum filtering mode} optimal interpolation mode; message playback mode.

In the optimal filtering mode, the optimal interpolation block 18 does not work. The input signal is fed to the delay line 13, from the outputs of which at the moment of time T-ut (where T is the moment of the end of the interval} At is the time increment)

Y.,

served on

magnitude signals

the third inputs of the main and additional multipliers 7 and 8. The additional adders 14 receive the values of a posteriori probabilities from the integrators 10. As a result of the summation, the values of N are determined that go to the second inputs of the first adders 3 and the second inputs of the additional 50 adders 4. The first adders 3 and the additional first adders 4, form the sums P + NV (where IJL is constant), for which their first inputs are fed jj

stresses (constants) from the block outputs. 1 formation of constants and additional blocks 2 of formation of constants. From the outputs of the first adders 3 and the additional first adders 4, the signals through the first amplifiers 5 and the additional first amplifiers 6, respectively, with the gain A / N are fed to the first inputs of the main and additional multipliers 7 and 8, the third inputs of which receive signals c. the outputs of the delay line 13, and the second inputs of the a posteriori probabilities W from the outputs of the integrators 10. At the outputs of the main and additional multipliers 7 and 8, signals F are generated (oi ,, ..., jx;), which are fed to the first inputs of the second adders 9, which form the derivatives of the posterior probabilities W-. To do this, the first inputs of the second adders 9 are supplied via the second amplifiers 11 with voltages corresponding to a posteriori probabilities. At the outputs of the second adders 9, derivatives of the a posteriori probabilities are formed, which are fed to the inputs of the integrators 10.

From the outputs of the Integrators 10, the posterior probabilities are supplied to the first inputs of the switch 16 operating modes, and then to the memory block 17, where they are stored. From the output of the 17 probes memory section, the posterior probabilities go to the second inputs of the 16 operating modes switch, from the second outputs of which go to block 18 optimal interpolation. From the outputs of the latter, signals arrive at the third inputs of the switch 16 of operation modes and then the adjusted values of the posterior probabilities go to the memory unit 17. In the message playback mode, the updated values of the a posteriori probabilities through the switch 16 operating modes arrive at the comparison unit 15, which makes a decision about the combination for which the posterior probability is maximum.

Thus, the introduction of new blocks can reduce the time delay for receiving a message.;

Claims (1)

DEVICE FOR RECEIVING A GENERALIZED TELEGRAPH SIGNAL, containing a comparison unit, the outputs of which are connected to the inputs of the output matching unit, and in each channel, a constant generation unit, the output of which is connected to the first input of the first adder, the output of which through the first amplifier is connected to the first input of the main multiplier, the output which is connected to the first input of the second adder, the output of which is connected to the input of the integrator, the output of which is connected to the second input of the main multiplier, and second amplifiers, the outputs of the cat They are connected to the second inputs of the second adder, characterized in that, in order to increase the reception speed, an operating mode switch, a memory unit, an optimal interpolation unit, a delay line, additional adders are introduced into it, and additional constants forming units are added to each channel, additional - first first adders, additional first amplifiers, additional multipliers and a third amplifier, the outputs of which are connected to the third input of the second adder, the first additional inputs of which are connected to the output and additional multipliers, the first inputs of which are connected to the outputs of the additional first amplifiers, the inputs of which are connected to the outputs of the first additional sums of tori, the first inputs of which are connected to the outputs of the additional units for forming constants, while the second inputs of the first adders are connected to the outputs of the additional adders, the inputs of which are connected to the second inputs of the main and additional multipliers, to the input of the third amplifier, to the output of the integrator and to the first inputs of the mode switch, whose output outputs are connected · to the inputs of the second amplifiers, the first outputs of the operating mode switch are connected to the inputs of the memory unit, the outputs of which are connected to the second inputs of the operating mode switch, the second outputs of which are connected to the inputs of the optimal interpolation unit, the outputs of which are connected to the third inputs of the operating mode switch , the third outputs of which are connected to the inputs of the comparison unit, and the outputs of the delay line are connected to the third inputs of the main and additional multipliers. SU „1163485 1 1163485 2