SU995349A1 - Adaptive device for evaluating received signal fidelity - Google Patents

Description

. This invention relates to telecommunications and can be used as a quality detector in a discrete signal receiver.

An adaptive device for estimating the reliability of a received signal is known, comprising a series-connected time signal sensor, a comparison unit, a control unit, a threshold signal generator, a threshold unit, the second input of which is connected to the output of the first matching unit, and the second matching unit of Cl 3.

However, this device has a low accuracy estimate of the reliability of the received signal.

The purpose of the invention is to improve the accuracy of assessing the reliability of the received signal.

The goal is achieved in that an adaptive device for assessing the reliability of a received signal, comprising a series-connected time signal sensor, a comparison unit, a control unit, a threshold signal generator, a threshold unit, the second input of which is connected to the output of the first matching unit, and the second matching unit , the first and second additional threshold blocks and the inhibit block are introduced, with the second and third outputs of the threshold signal generator connected to the first inputs, respectively, of the first o and the second additional threshold blocks, the second inputs of which are combined with the second input of the threshold block, and

The 10 outputs of the first and second additional threshold blocks are connected, respectively, with the inhibitory and signal inputs of the inhibit block, the KOTOpord output is connected to the second input of the comparison block.

The drawing shows a structural electrical circuit of an adaptive device for evaluating the reliability of a received signal.

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The adaptive device comprises a first matching unit 1, a threshold unit 2, a shaper 3 threshold signals, a second unit 4 matching unit 5, a unit 6

owl,

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7 control signals, a meni sensor, the first 8 and second 9 additional threshold blocks, and a prohibition block 10.

The device works as follows.

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Claims (1)

in a way. The received signal arrives at the first matching block 1, in which the signal is extracted due to non-systematic and systematic interference. The signal is then applied to the first inputs of the threshold block 2 and the first 8 and second 9 additional threshold blocks, to the second inputs of which are fed from the outputs of the imaging unit 3 threshold signals, analysis thresholds D1, d, 2, and lz. The threshold block extracts the erase signal, if the input signal crosses the analysis threshold in the first additional threshold block 8, it is set so that the signal arriving at the input of this block crosses the threshold level only if there is a strong interference in the communication channel. with a sufficiently high probability, it is possible to argue about a signal in a received signal, therefore, erasing signals from the output of this block can be called conditional erasures. In the threshold unit 2 and the second additional threshold unit 9, the analysis thresholds are adjusted with and their value is determined by the driver of the 3 threshold signals. The analysis / LZ threshold is more stringent than the D2 threshold, and D2 is selected in such a way that false erasures due to systematic interference are absent at the output of the threshold block. These erasers are fed to the second matching unit 4. The analysis threshold 3 with a correct adjustment of the analysis thresholds can be in the range of systematic interference, therefore, at its output, there are signals erasing from non-systematic interference. Erasing from systematic interference are always false erasures. From the output of the second additional horn unit 9, erasures are received at prohibition unit 10, in which a denying entry is made to the correct erasures. Thus, at the output of the prohibition block 10, there are erasures, which are conventionally called false erasures. These erasures are fed to a comparison unit 5, which counts the number of false erasures in the analysis interval and compares with a predetermined number (N). If the output of the comparison unit 5 appears in the signal, under the action of which the control unit 6 causes the driver 3 of the threshold signals to form less rigid thresholds. If N D5, # N, then under the action of the signal from comparison unit 5, the following are set: more severe analysis thresholds. The technical and economic efficiency of the proposed adaptive device for assessing the reliability of the received signal consists in increasing the estimation accuracy in channels 5 with any level of systematic interference by reducing the number of complex erasures and undetected errors. Claims of the invention An adaptive device for evaluating the reliability of a received signal, comprising a series-connected time signal sensor, a comparison unit, a control unit, a threshold signal generator, a threshold unit, the second input of which is connected to the output of the first matching unit. Nor, and the second matching unit, characterized in that, in order to improve the accuracy of the assessment, the first and second additional threshold blocks and the prohibition block, the second and the third, are introduced into it. the outputs of the threshold threshold generator are connected to the first inputs of the first and second additional threshold blocks, respectively, the second inputs of which are combined with the second input of the threshold block, and the outputs of the first and second additional threshold blocks are connected to the forbidding and signal inputs of the inhibit block, respectively, whose output is connected with the second input of the comparison block. Sources of information taken into account in the examination 1..CCIII, Special Study Group A, Signal equality Detector with SelfAd Justing Thresholds. Contribution No. 71, September, 1970 (prototype). 995349