SU862369A1 - Device for forming signal - Google Patents

Description

(54) DEVICE FOR SIGNAL FORMATION

Wipe

The invention relates to telecommunications and can be used in data transmission equipment.

A device for shaping the erase signal is known, which contains the input signal quality combined by the input of the detector according to the number of monitored parameters of the input signal, the unit for calculating the weighted sum of signals and the threshold unit 1.

However, the known device has a large number of false erase signals, which Q reduces the bandwidth of the device.

The purpose of the invention is to reduce the likelihood of forming a false erase signal.

For this purpose, an analyzer of the probability of false triggering of input signal quality detectors, an analyzer of the probability of pairwise triggering of input signal quality detectors and a weighting factor calculator are introduced into a known device for shaping the erase signal. 20 In this case, the outputs of the input signal quality detectors are connected to the combined corresponding inputs of the analyzer of the likelihood of false alarms of the input quality detectors, the analyzer of the likelihood of paired operation of the input quality detectors and the weighted sum calculation unit, the output and corresponding inputs of which are connected respectively to the input of the threshold unit and with the outputs of the weighting factor calculation unit, the first and second inputs of which are connected respectively to the outputs nalizatora probability paired detectors actuation input signal quality analyzer and the likelihood of false detection of the input signal quality to the control input of which is served by the error signal.

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

The device for generating the erase signal contains detectors 1 of the input signal quality, analyzer 2 probabilities of false triggering of the input signal quality detectors, analyzer 3 probabilities of paired operation of the input signal quality detectors, unit 4 for calculating weighting factors, unit 5 for calculating the weighted sum of signals and threshold unit 6 , 7 signal converter and decoder 8.

The device works as follows.

The received signal from converter 7 is fed to m detectors 1, which monitor individual signal parameters. The erase signals by separate parameters from the detectors 1 are sent to analyzer 2. Signal “Error from decoder 8 comes here. Coincidence of erase signal and signal“ Error indicates that erasure was correct. If the erase signal arrives when there is no signal “Error, the erasure was false. Analyzer 2 estimates the probability of false erasures for each of the m monitored parameters. The erase signals from the outputs of the detectors 1 also go to analyzer 3, where the joint erasure probabilities are evaluated for each of the two parameters. From the outputs of analyzers 2 and 3, the signals arrive at block 4, which calculates weighting factors.

The weights from the output of block 4 and the erase signals of the individual detectors 1 are fed to block 5, which calculates the weighted sum of the erase signals. From the output of block 5, the signal arrives at the threshold block 6, which compares the signal arriving at it with the set threshold and, in the event that this threshold is exceeded, gives an erase signal.

At predetermined thresholds, the device allows to obtain the minimum probability of spurious erasures, since the erasure signals are combined according to individual parameters taking into account weighting factors, which are determined taking into account the state of the channel.

Claims (1)

Claim device A device for generating an erase signal, containing input-quality input signal detectors by the number of monitored parameters of an input signal, a weighted sum signal calculation unit and a threshold unit, which in order to reduce the probability of forming a false erase signal, a probability analyzer is entered false positives of the quality of the input signal detectors, analyzer of the probability of a pair of triggered detectors of the quality of the input signal and the calculator weighting coefficients, while the outputs of the input signal quality detectors are connected to the combining inputs of the analyzer of the likelihood of false alarms of the quality detectors of the current signal, the probability analyzer napHoi o of the input quality detectors and the calculator signals, the output to the corresponding inputs of which are connected by the corresponding gben 10 to the input of the threshold unit and to the outputs of the weight calculation unit, the first and second inputs of which are connected by but with the probability of pair actuation quality detector input signal analyzer outputs n analyzer probability of false actuation input signal quality detectors on yrspaBl yuschy input of which is served by the error signal. Sources of information taken into account during the examination 1. Shuvalov V. P. Reception of signals with oiief; M 979, p. KOI their quality, (prototype).