SU442572A1 - A device for converting noise-like signals to discrete - Google Patents

Description

one

The invention relates to computing.

A device for converting noise-like signals to discrete signals is known, comprising a detector, an analog-to-digital converter and a pulse generator.

The purpose of the invention is to reduce the noise-like redundancy

signal with different frequency spectra.

The proposed device is characterized in that bandpass filters, integrators, threshold devices, i logic devices, and a memory block are introduced into it.

The block diagram of the described device is shown pa drawing.

The device contains a noise-like envelope detector 1, a pulse generator 2, processing channels 3 and 4, consisting respectively of band-pass filters 5, 6, analog-digital converters 7, 8, integrators 9, 10, threshold devices 11, 12, circuits match 13, 14, anti-match schemes 15, 16

multichannel memory block 17 with registers 18, 19.

The device works as follows.

5 The sampling period of the signal in each channel is equal to, N / 2, A. defined by a sequence of clock pulses of the generator 2.

The signal from the detector output through the co10, the corresponding band-pass filter, enters the analog-to-digital converter and, after sampling and quantizing by level, into the register. In parallel with di, signal scrambling, quantization of its 15 in level and writing to the register, each channel solves the problem of detection: I, if the voltage at the integrator output exceeds the threshold, this means that the spectrum of the noise-like signal contains the corresponding frequency signals.

nty. At the same time, a standard pulse is formed at the output of the threshold device: a pulse, which is fed to the control inputs of the coincidence and anti-accumulation cascades. Their other inputs receive a generator pulse 2,; whose period is equal to the accumulation time in the integrator. The same impulse is used to reset the integrator and poll the threshold device. i At the outputs of the coincidence and antitt circuits. matches are generated from the standard register information read pulses in the case of a threshold device and, accordingly, erase pulses if it does not work. In each channel, information about the segment of the implementation of a noise-like signal with a duration Q is represented as Mn. S.., Binary words, where N is chi J. ((lo channels, .i if the band of the noise-like signal j is D (k is integer number), then the information N about the segment of its realization with the duration Q is represented as M 2 ID - kN binary words. Obviously, M M 20 D.: Thus, a discrete representation of the noise-like signal without excess is received on the communication line. -, D M et al. A device for converting noise-like signals in discrete scale, comprising signal envelope detector, analog-to-digital converters, chronizer and multi-channel memory block, distinguishing eije so that N bandpass filters, integrators, threshold devices and i matching and anti-matching schemes are introduced to reduce the redundancy of the noise-like signal sampling with different frequency spectra The filter inputs are connected to the detector output, their outputs to the inputs of the corresponding integrator and the analog-digital converter, the output signal of which is fed to the corresponding register. the memory unit, and the outputs of the integrators, via the corresponding threshold device, the coincidence and anti-coincidence circuits are connected to the control inputs of the memory unit registers.