SU475631A1

SU475631A1 - DEVICE FOR DETECTION OF UNSTEADY FLOWS 1 The invention relates to radio correlation devices for detecting pulsed signals, in particular, characteristic points of these signals. This device has a high probability of coincidence of the useful signal pulses and interference pulses during processing of non-stationary pulse flows. Invention - reducing the likelihood of coincidence of the pulses of the useful signal and interference pulses. This is achieved by introducing into the offer of the device two formers of rectangular imiums of varying duration, which are connected between the output of each former of the standard impulses and one of the inputs of the AND circuit ; In addition, the variable-width linear pulse shaper contains a counter, the input and outputs of all bits of which are connected to the AND circuit, the outputs of which are connected to the input of the OR circuit via L 'generators of a predetermined duration. 1 shows a block diagram of the device; in fig. 2 is a diagram of a low-angle mover pulse generator. 2 The device contains <it inputs 1 and 2, the formers 3 and 4 of standard signals, the formers 5 and 6 of the irradiation pulses of variable angle, the “I” circuit 7, the counter 85 and the computing unit 9. Identical formers 5 and 6 contain the input terminal 10, the counter 11, L "schemes" And "12, L-" generators 13 of a given duration and the scheme "OR" 14. Input I through serially connected 10 formative 3 and 5 n input 2 through serially connected formative 4 n 6 are connected respectively to the first n second input The “I” 7 circuit, the output of which is connected to the computational unit 15 through the counter 8. In the generator 5 and 6, the input terminal 10 is connected to the first inputs of the L 'scheme. “And” 12 and to the input of the counter 11, each the output of which is connected to the corresponding input n input mn L '' of the circuits "And" 12, and the output of each circuit 20 "And" 12 is connected through the corresponding generator 13 to the corresponding input of the circuit "OR" 14. The device operates as follows. Signals that are not connected to the inputs 1 and 2 and ire-25 are formed by the corresponding formers 3 and 4 into the currents (sequences) of short standard emulsions corresponding in time to the characteristic points of the input signals. Shapes-30 rovers 5 and 6 convert a stream of pulses into a sequence of RECTANGULAR

Info

Publication number: SU475631A1
Application number: SU1923947A
Authority: SU
Inventors: Дмитрий Семенович Добряк; Владимир Александрович Харламов
Original assignee: Институт Радиотехники И Электроники Ан Ссср; Войсковая часть 51105
Priority date: 1973-05-31
Filing date: 1973-05-31
Publication date: 1975-06-30

Description

пульсов, длительность которых мен етс соответственно нестациоиарности входного потока пмпульсов. Формирование импульсов переменной длительности осуществл етс N генераторами 13, поочередно подключаемыми к входной клемме 10 с номо1цью коммутатора, состо ш ,его из счетчика II и N схем «И 12. Причем количество N определ етс числом импульсов, формируемых на длительности входного сигнала, а число разр дов счетчика 11 равно логарифму по основанию два из Л-. Импульсы с выходов N генераторов 13 через схему «ИЛИ 14 ностунают на один пз входов схемы «PI 7, на второй вход которой поступает аналогична сери с приемного канала. Счетчик 8 нодсчнтывает число срабатываний схемы «И 7 и нередает информацию в вычислительный блок 9, предназначенный дл сравнени показани счетчика 8 но истечению некоторого интервала счета с порогом. Еслн это показание нревышает порог, на выход вычислительиого блока 9 выдаетс ниформаци о наличии сигнала на входах 1 и 2, в противном случае информаци на выход неpulses, the duration of which varies according to the unsteady input flow of pulses. Variable-duration pulses are produced by N generators 13, alternately connected to input terminal 10 with the number of a switch, consisting of w, it consists of a counter II and N circuits "And 12. Moreover, the number N is determined by the number of pulses generated for the duration of the input signal and counter bits 11 is equal to the logarithm of base two of L-. The pulses from the outputs of the N generators 13 through the scheme "OR 14 nostunyut on one pz inputs of the circuit" PI 7, the second input of which receives a similar series from the receiving channel. The counter 8 nodschtvat the number of operations of the circuit "And 7 and does not damage the information in the computing unit 9, designed to compare the reading of the counter 8 but the expiration of a certain counting interval with a threshold. If this reading is above the threshold, the output of the calculating unit 9 is given information about the presence of a signal at inputs 1 and 2, otherwise the information at the output is not

поступает, а устройство ириводитс в исходное состо ние.enters, and the device is initialized.

П р е д м е т и з о б р е т е и и PRIOR DIRECTORSHIP and

Claims

1. A device for detecting unsteady streams, containing two standard-nm-for-NMR pulses, an AND circuit, an output connected to a computing unit through a counter, O and a loop; This is due to the fact that, in order to reduce the likelihood and coincidence of the pulses of a useful string and a pulse of interference, two formers of rectangular impulses of irrelevant duration, which are connected between the output, ohm of each former of the standard pulse, and one of the circuit inputs, AND.

2. The device according to claim 1, of which is HI e e so that the shaper of variable rectangular pulses contains a counter, the input and outputs of all bits of which are connected to the V circuits, whose outputs are the keys to the input schemes "OR through; V generators of a given duration.