RU1802419C - Device for transmission and reception of phase-shift signals - Google Patents

Abstract

SUMMARY OF THE INVENTION: the device comprises on the transmitting side one carrier frequency signal generator 1. one electronic key 2, one signal source 3, one code converter 4, one phase 5 keypad, one strip power amplifier 6, one signal sensor 7, on the receiving side - one unit of amplifiers 8, one coherent drive 9, one signal carrier signal isolator TO, one phase detector 11, one low-pass filter 12, one video generator 13, one indicator of the number of errors 14, one error detector 15, one different Native decoder 16, one matching block 17, one receiver of the signal 18.3-4-5-6-8- 9-10-11-12-13-16-17-18, 13-15-14, 3-7-2 5, 1-2, 9-11.2 ill.

Description

The invention relates to electronics.

The purpose of the invention is to improve noise immunity.

Figure 1 shows a structural electrical diagram of the proposed device.

The device contains on the transmitting side a generator 1 of a carrier frequency signal, an electronic key 2, a signal source 3, a code converter 4, a phase 5 manipulator, a strip power amplifier 6, a signal sensor 7, on the receiving side an amplifier block 8, a coherent drive 9, an isolator 10 carrier frequency signal, phase detector 11, low-pass filter 12, video generator 13, error count indicator 14, error detector 15, differential decoder 16, matching block 17, signal receiver 18.

Coherent lacquer 9 consists of recirculators 19, 20 and communication element 21. The recirculator (Fig. 2) contains an active element 22, a broadband delay line 23, an attenuator 24, an adder 25.

The device operates as follows.

The original binary signal from the source of 3 messages - a computer - is fed to code converter 4, which converts the signal from binary code to Miller code. The received signal in the Miller code consists of a sequence of pulses with a duration

 (n 2, 3, 4),

where T is the period of the clock frequency of the information signal.

The pause duration between pulses also has three discrete values equal to the pulse duration of the signal in the Miller code. The existing code redundancy provides the ability to control the error rate in the transmitted signal without interruption of communication. The differential properties of the Miller code make it possible to use the information signal in this code as a manipulation signal when generating a signal from the FRM.

As a phase 5 manipulator, a digital circuit is used - an adder modulo 2 - to the input of which an information signal and a carrier frequency signal are supplied.

A carrier signal is generated on digital elements. Generator 1 operates according to a three-point circuit, the frequency of its oscillations is stabilized by a quartz resonator.

Carrier frequency oscillations are supplied to the phase manipulator via an electronic switch 2 controlled by a sensor 7 of the presence of a signal at the transmitter input. The operation of the electronic key 2 ensures the absence of a signal at the output of the phase 5 manipulator when the information signal is paused. From the output of the phase 5 manipulator, a square wave arrives at the input of a strip amplifier 6 providing transmission and amplification of two bands of the information signal located symmetrically with respect to the carrier frequency in the band numerically equal to the information transfer rate in

5 channel. Band amplifier 6 can be made in the form of a band-pass filter with a linear phase response, for example a Gaussian filter, and a linear power amplifier,

0 as a transmission medium, a coaxial cable with increased shielding is used (for example, cables of the KGKE, KSCPE, KSCE types),

The signal from the transmission medium is received by block 8 having a high-impedance input and, after preliminary amplification, is fed to a band-pass amplifier based on a band-pass filter identical to the filter in transmission.

0 The restoration of the spectrum of the signal from the FRM that has passed the band channel in the proposed device is carried out by a coherent drive 9 consisting of two recirculators 19, 20 rigidly connected

5 with each other by the action of the total voltage on the communication element 21. Each of the recirculators 19, 20 consists of an active element 22 amplifying, limiting and inverting the signal, a broadband delay line 23 for a duration equal to half the period of the carrier frequency, attenuator 24 and the adder 2.5.

The switching speed (the duration of the edges of the square wave) is determined by the frequency properties of the reinforcing element and the broadband circuit of the OS.

Inertia — the retention time of the torus information recorded in the recirculator — is determined by the delay time of the signal in the delay line, which is the memory of the coherent storage device.

The operation of a coherent storage device can be represented as the operation of a generator of direct 5 pulses of carbon captured by frequency and phase by an information signal arriving at its input.

The process of tracking the phase of the information signal and compression is described in detail in the description of the method by which

This device is implemented. Here it should only be noted once again that a coherent storage device carries out a peculiar coherent reception of an information signal and provides a gain in s / w ratio at a reference point of at least 6 dB.

At the output of the coherent storage device 9, a rectangular voltage is formed that is independent of the amplitude of the amplitude of the incoming information signals and corresponding in phase to phase of the carrier wave of the radio pulse.

This voltage is applied to the input of the phase detector 11 and the separator 10, in which the phase modulation of the signal is carried out by squaring the signal and then dividing the signal frequency by two. After phase detection and passage of the low-pass filter 12, pulses of an information signal of a trapezoidal shape with a rounded apex of a trapezoid are formed at the input of the video generator 13.

The video generator 13 compares the signal with the reference voltage at time instants (reference point) corresponding to the maximum opening of the eye diagram.

At the output of the video generator 13, rectangular pulses of the information signal are generated in the Miller code, which are subsequently fed to the error detector 15 and decoder 16.

Error detection is accomplished by detecting forbidden pulse patterns for the Miller code. To provide an indication, the pulses from the error detector increase in duration and a part of the pulses corresponding to errors in the signal when the device enters the operating mode is cut off.

As an indicator 14 of errors, an LED can be applied by the number of flashes of which per unit time, it is possible to draw a conclusion about the particular errors in the signal.

Decoder 16 converts the signal from the Miller code to binary code. The operation of the decoder 16 is based on the inverse of the differential encoding signal conversion and the correct phase setting by the combination of incoming symbols O 1 O or 10 1.

The binary signal from the output of decoder 16 through the matching block 17 is received by the message recipient 18.

Claims (1)

SUMMARY OF THE INVENTION A device for transmitting and receiving phasomanipulated signals, comprising, on a transmitting side, a signal source, a signal sensor and an electronic key, the control input and output of which are connected respectively to the output of the carrier signal generator and to the control input of the phase manipulator, the output of which is connected to the input of a strip power amplifier, and on the receiving side, a block of amplifiers and serially connected carrier signal selector, phase detector, a low-pass filter and a video generator, the output of which is connected to the inputs of the error detector and differential decoder, the outputs of which are connected respectively to the inputs of the indicator of the number of errors and matching unit, the output of which is connected to the input of the signal receiver, while the signal inputs of the phase detector are connected to the signal inputs of the signal extractor carrier frequency, characterized in that, in order to increase noise immunity, a code converter is introduced on the transmitting side, the input and output of which is connected s, respectively, with the source output signal and the signal input of phase manipulation of the torus, and at the receiving side the coherent accumulator is entered, the inputs and outputs of which are connected respectively to the outputs of amplifiers unit and with signal inputs of the phase detector. Ifff 23 25 22 2