SU1494014A1 - Device for simulation of multi-channel data transmission system with time-shared channels using phase-pulsed modulation - Google Patents

Abstract

The invention relates to computing, is designed to simulate the distortion of signals in a communication channel and can be used as a technical training tool. The purpose of the invention is to expand the functionality of the device by simulating the distortion of the delay of a pulse signal in any number of channels. For this purpose, elements are introduced into the device simulating communication channels, which make it possible to form distortions of the pulse signals in phase both in one channel and in any number of channels. 2 Il.

Description

one

(2T 4331294 / 24-24

(22) 11/24/87

(46) 1507.89. Bksh. No. 26

(71) North-West Correspondence Polytechnic Institute

(72) O.L.Sokolov

(53) 621.391.833 (088.8)

(56) USSR Copyright Certificate fr 807312, Clo G 06 F 15/20, 1981.

Radio-technical systems of information transmission. Methodical instructions for laboratory work. L., SZPI, 1986, p. 12.

(54) DEVICE FOR MODELING MULTICHANNEL INFORMATION TRANSFER SYSTEM WITH TEMPORARY DIVISION

CHANNELS WITH FA3011MONSULAR MODULATION (57) The invention relates to computer technology, is intended to simulate signal distortion in a communication channel and can be used as a technical tool for training. The purpose of the invention is to expand the functionality of the device by simulating the distortion of the delay of a pulse signal in any number of channels. For this purpose, elements are introduced into the device simulating communication channels, which make it possible to form distortions of the pulse signals in phase both in one channel and in any number of channels. 2 Il.

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The invention relates to computing, is designed to simulate the distortion of signals in a communication channel and can be used as a technical training tool.

The purpose of the invention is to expand the functionality of the device by simulating the distortion of the delay of a pulse signal in any number of channels.

Figure 1 shows a diagram of the proposed device; Fig. 2 shows stress plots with,

The device contains a generator of 1 clock pulses, n channels of the transmitter model, each of which contains a series-connected sensor 2-1, ..., 2-p. Messages, modulator, 3-1, ..., 3-p, differentiating circuit 4-1, ..., 4-p, limiter 5-1, .o.,

5-p, as well as the first adder 6, connected in series the first driver 7 messages and a differentiating circuit 8.

The device also contains in-1 channels of the receiver model, each of which contains a demodulator 9-1, .., 9-n, an output connected to the combined differentiating inputs, a chain 10-1, ..., lO- (nI) and a filter 11-1. O., 11-p. The output of the clock generator 1 is connected to the first input of the first adder 6 and the start input of the first first modulator 3-1. The output of the limiter 5-J is connected to (jtl) -M input of the first adder 6 and the start input, modulator 3- (jil), except the limiter 5-n, which is connected only to (nil) -M input of the first adder 6. Output of the first adder 6 is connected to the input of the first driver 7 coNU

WITH

The inputs and all the demodulators 9-1,. ,, 9-n of all n channels of the receiver model. At the same time, the output of the differential circuit is connected to the trigger input of the first demodulator (9-1). The output of the differentiating circuit of the j-th channel (10-J) of the receiver model is connected to the trigger input of the demodulator of the 9- (J +) (j) -th channel, except for the n-th channel, the 9-n demodulator of which is connected only to the filter input 11 p.

In addition, the device contains the second driver 12 messages, PG successively connected elements 13-1, o.c, 13-t delay, m keys, 14-1, „. ,, 14-t and the second adder 15

The information input of the second shaper 12 is connected to the output of the generator 1 clock pulses The output of the shaper 12 is connected to the input of the first delay element 13-1. The output of each element 1 3-1, „o, 1 3 - t of the detuning is connected to the input of the corresponding key 14-1, oo, 14-t, and the output of each key is connected to the corresponding input of the second adder 15" The output of the second adder 15 connected to the (n + 2) -th input of the first adder 6; The control inputs of the keys 14-1,. „., 14-t are connected to the controls

The device works as follows.

The driver that determines the operation of the transmitter model channels is the 1 clock pulse generator. At the output of the generator 1, the synchronization pulses are output to the input of the first adder 6 and the modulator 3-1 of the first channel, which is triggered from the clock pulse, and at its output, pulses are generated, modulated along the width of the first channel

The clock pulses from the generator 1 output are shown.

FIG. 26 shows the irion-modulated pulses at the output of the 3-K modulator.

Fig. 2c shows pulses at the output of dshM of the reactive circuit 4-1, which are converted at the output of the limiter 5-1 into the pulse sequence shown in Fig. 2d.

Thus, the pulse-modulation pulse is converted into phase impulses (OFiM), such that

the intervals between the sync pulses and the pulses appearing at the output of the limiter 5-1, on some scale, characterize the telemetry value in the first channel. The pulses at the output of the limiter 3-1 are fed to the input of the first adder 6 and to the start of the modulator 3-2 of the second channel, in which, under the action of the voltage from the output of the sensor 2-2, a similar pulse width modulation occurs, shown in FIG. The output of the limiter 5-2 appears pulses (Fig. 2e), the intervals from which to the pulses acting on the output of the limiter 5-1 are proportional to the implications of the voltage at the output of the sensor 2-2. All subsequent modulators work similarly about

The pulses from the outputs of the limiters 5-1, ..., 5-p are fed to the corresponding, inputs of the first adder 6, at the output of which a sequence of pulses is formed. On fig.2zh shows triples of pulses, the corresponding two; anal information transfer system. Moreover, in the I and II cycles of operation, the device has no distortion of the delay of the pulse signals ahead in two channels. In the III and IV cycles, the delays in the pulse delay are shown in the second and first channels of the device, respectively. It is clear that in the III and IV cycles of operation of the device, instead of triples of pulses, they receive four img1 pulses. In this case, the fourth pulse in the third cycle arrives at the input of the first adder 6 from the output of the second adder 15 (FIG. 2c). In turn, the fourth pulse arrives at the i-th input of the second adder 15 from the output of the key 14-i, which is connected to the output of the element 13-i delay. Element 13-i for; delays determines the instants tj of the occurrence of a distorting pulse delayed relative to the clock pulse from the output of the second driver 12.

The fourth pulse (Fig.2i) in the IV cycle enters the input of the first adder 6 from the output of the second adder pa 15, where it arrives at the pth input from the output of the 14-p key, which is connected to the output element; ki The delay element 13-p determines the instant t p of the appearance of a distorted pulse.

five

The pulses from the output of the first adder 6 are fed to the model of the receiver of the device. In the shaper 7, a sync pulse is released in all the cycles shown in FIG.

In the first and second channels of the operation of the device, demodulators 9-1 and 9-2 of the first and second channels convert the undistorted values of the FIM into pulse-width modulation.

The situation is different in III and IV cycles. In the third cycle, at the moment t, a distorting pulse appears, which leads to an undistorted conversion of the FIM to pulse-width modulation in demodulator 9-1 and distortion of pulse-width modulation in demodulator 9-2. Indeed, the launch of the demodulator of torus 9-2 occurs at the time of the appearance of the second pulse by a pulse from the output of the differentiated circuit 10-1, and the return to the initial state by the next — the third pulse, An14

logically impaired by the 25 pulse serial number - to the de-modulation triggering input in the first and second channels when a fourth distortion pulse appears at time t.

Claims (1)

Invention Formula A device for simulating a multichannel information transmission system with time division channels with phase-pulse modulation, containing a clock generator, n channels of the transmitter model, each of which contains a coupling sensor, a modulator, a differentiating circuit, a limiter, also a delay element 40, output 1 th ele The structure includes an adder, a first message generator, a differentiating circuit, n-1 channels of the receiver model, each of which contains a demodulator, a differentiating circuit, a filter, and the n-th channel M (5 receiver modules contain a serially connected demodulator and filter, moreover, the output of the clock pulse generator is connected to the first input of the first adder and the start input of the modulator of the first channel of the transmitter model, the output of the sensor is communicating 1494014 the transmitter model, the message sensor output of each channel of the transmitter model is connected to the information input of the modulator of its channel, the output of which through the differentiating circuit is connected to the input of the limiter of its channel, the output of the limiter of the jth channel, where j,. connected to the (j + l) -My input of the first adder and the start input of the modulator (j + l) -ro channel of the transmitter, the output of the first adder is connected to the information inputs of demodulators of each of the n channels of the receiver model and the information input of the first message generator, output which through the differentiating circuit is connected to the trigger input of the demodulator the first channel of the receiver model, the demodulator output of the j-th channel of the receiver model is connected to the input of the filter of its channel and through the differentiating circuit of its channel of the receiver model A puller (j + l) -ro of a cocoa, characterized in that, in order to extend the functionality of the device due to the simulation of no distortion of the pulse signal in any number of channels, a second message generator, mn delayed-connected delay elements, m keys are entered into it , 25 second adder, while the output of the clock generator is connected to the information input of the second message generator, the output of which is connected to the input of the first delay point, where, ..., ni, is connected to the information input of the i-ro key, the output of which is connected to the i-th input of the second adder, the output of which is connected to the (n + 2) -th input of the first adder, the control inputs The m keys are the control inputs of a device whose information inputs are informational The 5Q inputs of the transmitter channel sensor messages, the filter outputs of the receiver model channels are device outputs. Jnpofft i-to n / 11Och iJnpaOfl 1-to H / tfcva u u L u   i f ff.  ll). I I I M U U IP  ill, l ill I I I I III 1 I 111 iti THEM I I 1I J I I I Modtn pgr Yaotchina Phi) 1 f ff I-I  ) U IP I I I THEM I I 1 I I I 111