SU849505A1 - Device for simulating information transmission through composite communication channel - Google Patents

Description

The invention relates to a technique for modeling discrete information transfer processes and can be used in communication systems with composite channels. A device for simulating the transmission of information over a composite communication channel is known, comprising a delay analysis unit, a call signal generator, an external stimulation simulation unit, a recording unit and a DJ control unit. However, the known device has a long simulation time. The purpose of the invention is a reduction. simulation time. The goal is achieved by the fact that, a device for simulating transmission of information by. the composite communication channel, which contains the analysis unit for delaying the call signal shaper, the external effects simulation unit, the recording unit and the control unit, introduces the clock frequency shaper, the time interval shaper, and call translation blocks for the number of sections of the composite Kaijtana communication, with the first shaper signal output call through serially connected call translation units by the number of sections of the composite communication channel and the time interval generator, the second input of which is connected to the first the call signal driver is connected to the first input of the registration unit, and the second call signal generator output is connected via a serially connected delay analysis unit, whose signal codes are connected to the outputs of the corresponding call translation units, and the control unit is connected to the clock frequency input, the outputs of which are connected with the corresponding inputs of the registration unit and, with clock inputs of the corresponding call TpaiHCtion units, the control inputs

which are connected to the corresponding outputs of the external effects modeling unit.

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

A device for simulating information transmission over a composite communication channel comprises a delay analysis unit 1, a call signaling device 2, a call translation unit 3, their number is determined by the number of sections of the composite communication channel, a recording unit 4, a time interval forming device 5, a modeling unit 6 external influences, shaper 7 clock frequencies, block 8. control.

The device works as follows.

Call signal generator 2 generates a call codeogram, which is a binary code sequence, for example, an M-sequence, and enters it into the first call translation unit 3. Simultaneously, the signal of the beginning of the transfer of the call (time tg) from the imaging unit 2 enters the imaging unit 5 time intervals and in block 1 of the analysis of the delay. Block 1 and world leader 5 fix the moment t.

Promotion of information (calling codograms in the first block 3 of the call translation is carried out at a rate determined by the clock frequency f received from the first output of the driver 7 clock often The frequency f is chosen from the condition

T -M., Tg-n, V TO

where Tg is the required transmission time to the codes in I through blocks 3;

 transmission time codeograms. through one block 3;

P is the number of blocks 3. In block 6 of the simulation of external influences, according to a previously entered program, random delays are formed in the blocks of call translation blocks 3. In this case, during the delay time, the codogram cannot be copied from the previous block 3 to the next one. Laws of distribution; delays are set based on the conditions of operation

channels, the models of which are blocks 3.

Thus, exit codogram 3 will exit with a random delay.

in time dT 0. If the clock frequency in the subsequent blocks 3 is equal to f, then the transmission of the codogram B11 will take time t TjQ, which is not permissible according to the experimental conditions (the time of submission of the codogram should not exceed TQ) ,. Therefore, the frequency of advancement of information in the second block 3 is established from the condition

(n-1) TQo 2 TO - TOO-1 bi

Obviously, f f. If the codogram comes out of the second (p-1) block 0 C with a random delay ΔT (on-l, then the frequency f (f) is chosen from the condition

„Sp-2) TOO

Chl-3 To-aGoo-lTo, -dT (, h.

Mountain

(To-Sp-Doo- in uTi

and-

Setting the frequency t „- g occurs

in the following way. Since the outputs (n-l) of the call translation blocks are connected to the inputs of block 1, the latter captures all delays of the call codogram and enters information about them into block 8 of the control. The control unit 8 calculates the frequency for the next block 3, taking into account the delay in the previous block 3, and issues the appropriate command to the world clock frequency generator 7, from the output of which the clock pulses with the set frequency begin to flow to the required block 3.

All set frequency ratings

j are fixed at block 4 of registration. The moment Z of the codogram output from the last block of the 3 transfer of the call is fixed in the shaper of 5 time slots. The latter produces

 calculating the interval t and entered. danie information about him in block 4 registration.

Thus, the proposed device allows for one simulation cycle to determine the Tpe6yei i transfer rate (depending on the number of channels and the nature of the interfering influences taking place in them) on complex composite channels.

connection. In this case, the transmission time of the call codogram (t -t) is also obtained which makes it possible to estimate the probability value P (t (Tj,) P (T).

Claims (1)

1. USSR author's certificate in application number 2579243 / 18-09, cl. H 04 B 3/04, 08.02.78. ei-