SU1292015A1 - Device for simulating multichannel communication system - Google Patents

Abstract

The invention relates to a technique for modeling discrete information transfer systems. The purpose of the invention is to increase the efficiency of use of the communication link band in simulating the transmission of digital information. To achieve the goal, the device further comprises a frequency divider and K / 2 controlled inverters in the model of the transmitting side and a frequency divider and K / 2 controlled inverters in the model of the receiving side. The device allows reducing the effective spectrum width of transmitted signals by transmitting digital information by at least 10%. 1 il. Q S CL 2 SP

Description

The invention relates to a modeling technique and can be used in modeling a system for transmitting discrete information.

The purpose of the invention is to increase the efficiency of using a band of communication lines in simulating the transmission of digital information.

The drawing shows a block diagram of the device.

The device contains a transmitting side model consisting of Walsh function generator 1, frequency divider 2, K / 2 controlled inverters 3, K multipliers 4, adder 5. The receiver side model consists of 6 Walsh function generator, frequency divider 7, K / 2 controlled inverters 8, K multipliers 9, and K integrators 10. The device also includes a communication line 11.

The device works as follows.

The Walsh function generator 1 produces the functions that appear at its outputs in accordance with the Walsh ordering. At the output of divider 2 frequency, a unit signal is generated for odd periods of Walsh functions and a zero signal for even periods of functions. When incoming to the control inputs of 3 O inverters, the input signals are inverted; upon receipt of 1, the inversion does not occur. Thus, the second inputs of the odd multipliers 4 receive the Walsh functions in an unchanged form, and the second inputs of the even ones - in an unchanged form during odd-numbered periods of time and in an inverse form during even-numbered periods of time. In the multiplier, the channel messages are multiplied by the received functions. The output signals of the multiplier € 4 and 4 are summed in adder 5, and from its output the sum signal goes to the communication line.

On the receiving side, the generator 6 Walsh functions produce functions similar to the generator 1 Walsh functions on the transmitting side. The operation of the frequency divider 7, controlled by the inverters 8, is similar to the operation of the divider 2 and inverters 3 on the transmitting side, respectively. Thus, the second inputs of the multipliers 9 receive signals similar to those received at the second inputs — multiply

4. The first inputs of the multipliers 9 are fed into the output signal from the output of the communication line. In multiplier 9, the input signal is multiplied by one of the orthogonal functions. The signals from the outputs of the multipliers 9 are fed to the inputs of the integrators 10, from the outputs of which the messages are received by recipients.

The device allows to reduce by at least / less than 10% the effective width of the spectrum of transmitted signals when transmitting digital information.

Formula of invention

A device for simulating a multi-channel communication system comprising a communication line, a transmitting side model and a receiving side model, the transmitting side model contains a Walsh function generator, an adder and K multipliers whose first inputs are device information inputs, the second inputs of odd multipliers are connected respectively to the outputs of the Walsh function, and the multiplier outputs are connected respectively to the inputs of the adder, the output of which is connected to the input of the communication line, the receiving side model with The Walsh function generator, K integrators and K multipliers, the first inputs of which are connected to the output of the communication line, the second inputs of odd multipliers of the receiving side model are connected respectively to the outputs of the Walsh function generator of the receiving side model, the codes of the receiving side model multipliers are respectively integrator inputs whose outputs are device outputs, characterized in that, in order to increase the efficiency of the use of the communication link band in transmission modeling Digital information, it additionally contains a frequency divider and K / 2 controlled inverters in the model of the transmitting side and a frequency divider and K / 2 controlled inverters in the receiving side model, and in the receiving side model and the transmitting side model, the input of the frequency divider is connected to the clock the output of the Walsh function generator, and the output divide / g frequency is connected

31292015

with control inputs controlled; Walsh, and the outputs of controlled inverter inverters, information inputs. tori are connected respectively to which are connected respectively to the second inputs of the even-numbered ones to the even-numbered outputs of the residents function generator.

Editor B. Petrash

Order 274/50 Circulation 673 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

. Production and printing company, Uzhgorod, Projecto st., 4

Compiled by V.Fukalov

Tehred L.Oleynik Proofreader N.Korol

Claims (1)

Claim A device for modeling a multi-channel communication system containing a 2Q communication line, a model of the transmitting side and a model of the receiving side, the model of the transmitting side contains a Walsh function generator, an adder and K multipliers, the first inputs of which are 25 information inputs of the device, the second inputs of the odd multipliers are connected respectively to the outputs generator of Walsh functions, and the outputs of the multipliers are connected respectively to the inputs of the adder, the output of which is connected to the input of the communication line, the model of the receiving side with Walsh generator holding functions K and K integrators peremnozhiteloy, first inputs of which are connected to the output link, the second inputs of the multipliers of odd pattern corresponding receiving side are connected. With the outputs of the generator of the Walsh functions of the receiver side model, · »the outputs of the multipliers of the receiver side model are connected respectively to the inputs of integrators, the outputs of which are device outputs, characterized in that, in order to increase the efficiency of using the frequency band of the communication line when modeling the transmission of digital information , it additionally contains a frequency divider and K / 2 controlled inverters in the transmitter side model and a frequency divider and K / 2 controlled inverters in the receiver side model, at 55 than in the model of the receiving side and in the model of the transmitting side, the input of the frequency divider is connected to the clock output of the Walsh function generator, and the output of the frequency divider is connected to the control inputs of the controlled inverters, the information inputs of which are connected respectively to the even outputs of the function generator Walsh, and the outputs of controlled inverters are connected respectively to the second inputs of even alternating residents. f