SU798659A1 - Signal evaluating apparatus - Google Patents

Description

I

The invention relates to radio engineering and can be used in time-division pulsed communication systems.

A signal evaluation device is known, comprising N channels from a series-connected processing unit with an accumulation and a threshold block, outputs of the threshold blocks are connected to a decision block, the first inputs of the accumulation processing blocks are combined and are the first input of the device, and the outputs of the reference oscillator are connected to their second inputs zodiac fl.

However, in the known device with a small processing time, and, consequently, low thresholds set in the threshold blocks, simultaneous movement is very frequent. threshold in multiple channels. Then, if one of them is equally accepted, the signal probability of an olby is high. To avoid an erroneous solution, it is necessary to set high thresholds and select a large accumulation time. “In addition, the processing time has to be set to the maximum, based on the worst input signal, the interference signal, and since it is fixed, the device performance remains unchanged even in the absence of interference at the device input.

The purpose of the invention is to reduce the average processing time of the input signal mixture and interference at a given probability of correct signal evaluation.

The goal is achieved by the fact that, in a signal estimator comprising N channels from a series-connected, processing unit

5 by the cumulative and threshold block, the outputs of the threshold blocks are connected to the decision block, the first inputs of the accumulation processing units are combined and are the first input of the device, and

0, the outputs of the generator of reference signals are connected to their second inputs, the first and second pulse counters are entered, the N input 1B of the first and second pulse counters are connected to the second outputs of the processing units with accumulation and the outputs of the threshold blocks, the second and inputs of which are connected respectively to the outputs first and second pulse counters, N + 1 whose inputs

connected to the input of the generator of reference signals and are the second input of the device, the output of the second pulse counter is also connected to the N + 1 input of the decision block, and the processing processing units are made of serially connected correlator, binary quantizer and storage counter, the first and the second inputs of the correlator are respectively the first and second inputs of the processing unit with accumulation, and the output of the accumulator counter and the output of the binary quantizer connected to the third input of the correlator are co respectively, the first and second outputs of the processing unit with the accumulation ..

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

The signal evaluation device contains a generator of 1 reference signals, a decisive block 2, N channels from series-connected processing block 3 with accumulation and threshold block 4, counters 5 and b pulses. Each of processing blocks 3 has an accumulator correlator 7, binary qualter 8 and counter drive 9.

The device works as follows.

A mixture of useful periodic pulse signal and noise is fed to the first input of the device, i.e. The first inputs of all processing units 3 with accumulation (first inputs of correlators 7), the second inputs of these blocks (second inputs of correlators 7) from the reference signal generator 1 each sample repetition period is given a sample signal, respectively, shifted by its duration. It is assumed / that the signal may occupy a time interval equal to the period of its repetition N independent variable time positions. After multiplying these two voltages and integrating the product within the duration of the signal in the correlator 7, the resulting number given by the output voltage of the correlator is compared in the binary quantizer 8 with a certain amplitude threshold and binary quantized, when the threshold is exceeded, a pulse of normalized duration and unity are generated. the amplitudes are a quantized pulse and nothing is generated when it is not exceeded. Thereafter, the voltage generated in the correlator 7 is reset to the next repetition period of the signal. The number of quantized pulses at the output of each of the binary quantizers 8 is counted (accumulated) by the corresponding counter-accumulator 9. The accumulated

numbers are compared with equal thresholds set in threshold blocks 4. When the threshold is reached in any

the threshold unit 4, at its output, produces a pulse n1-.beam. The number of these pulses in each repetition period of a signal is counted by a counter of 6 pulses. If the threshold is reached only in one of the threshold blocks 4, then the pulse counter b allows the decision block 2 to output the signal estimate, i.e. Signal detection signal with indication of the signal channel number. If the threshold is reached in several threshold blocks 4, then the pulse counter b will prohibit solver block 2 from making a decision and increase the threshold in each of threshold blocks 4 by one unit, etc. until the threshold is reached only in one of the threshold blocks 4. A counter of 5 pulses each repetition period of the signal counts the total number of quantized pulses at the outputs of all binary quantizers 8. If this number exceeds a certain threshold value, nothing is formed at the output of counter 5. Otherwise, the counter 5 lowers the threshold in the threshold blocks 4 on the stump unit. If the threshold blocks 4 receive commands from both the first 5 and the second 6 pulse counters, then the priority is given to the command from the pulse counter b to increase the threshold by one. Synchronize the device operation over the signal repetition periods, for example, the zero-period zero on the first 5 and second b The pulse counters are carried out by auxiliary pulses, 1, which follow with a period of repetition of the signal and are fed to the second input of the entire device.

The use of the proposed signal estimator reduces the average processing time of the input signal and interference mixture when making the correct signal estimate with a given probability several times.

Claims (1)

Invention Formula 1- A signal evaluation device containing N channels from series-connected processing blocks with accumulation and a threshold block; the outputs of the threshold blocks are connected to the decisive block, the first inputs of the accumulation processing units are combined and are the first input of the device, and the outputs of the reference signal generator are connected to their second inputs, characterized in that, in order to reduce the average processing time of the input signal mixture and interference, with a given probability of a correct estimate signal, entered the first and second pulse counters, with N inputs of the first and second