SU553751A1 - Multichannel device for pulse signal searching - Google Patents

Description

A multichannel device for searching a pulse signal contains a coding unit 1, a switch 2 connected to a clock frequency generator 3, a binary quantizer 4 with a low threshold, the input of which is the device input, and the output through each corresponding channel for each channel And 5 is connected to the channel detector 6, the second input of each of which is connected to the second input of the first element And 5. Each of the channels contains the second element And 7, the first input connected to the corresponding output of the switch 2, the second input h Through a series-connected additional binary quantizer 8, which is a high threshold quantizer, and prohibition element 9 — with the device input, and output through the strobe-pulse generator 10 — with the second input of the first element AND 5 and with the corresponding input of the element OR 11, whose output connected to the control input of prohibition element 9; the output of the channel detector 6 through the third element I 12 is connected to the corresponding input of the coding unit 1, the second input of the third element 12 connecting to the second input of the channel detector 6, the additional output of which is connected to the control input of the generator 10 and the corresponding input of the switch 2. The device works in the following way. The input of the device receives a mixture of signal and noise. At the initial moment of time, all channels of the device are free, strobe-pulse generators 10 are turned off, prohibition element 9 is open, channel detectors 6 are set to the zero state. The switch 2, using a clock pulse generator 3, produces successively in time at the outputs of its bits, pulses with a duration equal to the duration of the elementary portion of the range. These pulses alternately open the elements of AND 7. When the mixture exceeds the signal and noise of the high threshold of the additional binary quantizer 8, a pulse appears at its output, which through the element 7 that is open at that moment turns on the generator 10 of the corresponding channel, and it begins to produce gating pulses following with a repetition period of the input signal. These pulses are transmitted through the element OR 11 to the prohibition element 9, so that the pulses exceeding the high threshold do not pass to the elements AND 7 of other channels. This eliminates the "occupation of other channels for analyzing the mixture of signal and noise in this part of the range. The strobe pulses are counted in the sample counter of the channel detector 6 and the element 5 is opened, to which the excess pulses are received from the binary quantizer 4. The number of coincidence of strobe pulses n pulses exceeding the low threshold is counted in the elevation counter of the channel detector 6. Since the generator 10 was turned on in the channel The detector 6 generates a " imbedded " signal that excludes from the switch the switch discharge 2 corresponding to this channel. Next, only remaining free channels. Upon completion of the analysis of the mixture of signal and noise in the channel detector 6, if a decision is made about the absence of a signal, generator 10 is turned off, a zero state is set in the counters of the channel detector 6, the busy signal is removed, and the channel is switched to the switching ring again. If, as a result of the analysis, a decision is made about the presence of a signal, the channel detector 6 sends a signal to element 12 that permits the passage of the last pulse generated by generator 10 to the corresponding input of the coding unit 1. It produces a range code at which the signal is detected . Any other device channels work in the same way. The main advantage of the proposed device is a significant reduction in the volume of equipment with a slight increase in search time. In addition, it has increased functional reliability, since in the event of an element failure in one of the channels, not a single elementary segment of the range is excluded from the analysis: the analysis is performed by healthy channels. Formula and 3 sets of a Multichannel device for searching a pulse signal, containing an encoding unit, a switch connected to a clock generator, a binary quantizer whose input is an input of the device, and an output through the first And for each channel connected to the channel detector, the second input of each of which is connected to the second input of the first element AND, characterized in that, in order to increase its reliability and reduce the number of channels, the second element AND, ne the input is connected to the corresponding output of the switch, the second input through the series-connected additional binary quantizer and the inhibit element — to the device input, and the output — through the strobe pulse generator — to the second input of the first AND element and the corresponding input of the newly entered element OR, output which is connected to the control input of the prohibition element, the output of the channel detector through the third element I is connected to the corresponding input of the coding block, and the second input of the third element And it connects with the second input of the channel locator, the additional output of which is connected with the control input of the generator

strobe pulses and the corresponding input g switch.

Sources of information taken into account in the examination:

1. M.Skolnnk. Entered: e in radpoloi technique. :: iiU on b: x systems. Per. from English, “Peace, 1965, p. 539-540.

2. “Questions of radio electronics, 1960, ser. XII, issue. 15, s. 66-69.

MP

i i

  dafJi HoCffi