SU564719A1

SU564719A1 - Pulse signals receiver

Info

Publication number: SU564719A1
Application number: SU7201805175A
Authority: SU
Inventors: Лев Яковлевич Биневич
Original assignee: Всесоюзный Научно-Исследовательский Институт Методики И Техники Разведки
Priority date: 1972-07-03
Filing date: 1972-07-03
Publication date: 1977-07-05

Description

(54) ПРИЕМНИК ИМПУЛЬСНЫХ СИГНАЛОВ(54) PULSE SIGNAL RECEIVER

1one

Изобретение относитс к радиотехнике и может использоватьс дл повышени рарешающей способности импульсных, систем измерени , обнаружени и св зи.The invention relates to radio engineering and can be used to improve the resolving power of pulsed, measurement, detection and communication systems.

Известен приемник импульсных сигналов , содержащий блок выделени высокой частоты, детектор, видеоусилитель и оптимальный фильтр обнаружени , к выходу которого подключены нелинейные формирующие блоки l3 . .A known receiver of pulse signals comprising a high-frequency extraction unit, a detector, a video amplifier and an optimal detection filter, the output of which is connected to nonlinear l3 forming units. .

Однако такой приемник обладает недостаточной разрещающей способностью, а его надежное функционирование возможно лишь при значительном превышении сигнала над шумом на выходе оптимального фильтра.However, such a receiver has insufficient resolution, and its reliable operation is possible only if the signal is significantly higher than the noise at the output of the optimal filter.

Наиболее близким техническим решением к предложенному изобретению вл етс приемник импульсных сигналов, содержащий блок выделени высокой частоты, вы ход которого подключен к входу детектора, фильтр и видеоусилитель 2 .The closest technical solution to the proposed invention is a pulse signal receiver comprising a high frequency selection unit, the output of which is connected to the detector input, a filter and a video amplifier 2.

Такой приемник импульсных сигналов позвол ет получать максимально возможную помехоустойчивость при увеличении Such a receiver of pulse signals allows to obtain the highest possible noise immunity with increasing

длительности принимаемого сигнала. Однако при этом падает разрешающа способность устройства.the duration of the received signal. However, the resolution of the device decreases.

Дл устранени указанного недостатка в приемник импульс(уз1х сигналов, содержащий блок вьщелени высокой частоты, выход которого подключен ко входу детектора , фильтр и видеоусилитель, введены согласующий блок и сумматор, при этом выход детектора через согласующий блок подключен к входу фильтра (2и-1), выходы гсоторого подключены к соответствующим входам сумматора непосредственно, а другие выходы - к соответствующим входам сумматора через фазоинверсные блоки,причем выход сумматора подключен к входу видеоусилител , а также тем, что фильтр выполнен в виде объединенных по входу ti полосовых фильтров, каждый из которых настроен на 4acTOTyf 2,ri/-4iQ i где И 1,2.3..., ig - заданный момент/ времени дл обнаружени полезного сигнала .To eliminate this shortcoming, a pulse (receiver signals containing a high-frequency separation unit whose output is connected to the detector input, a filter and a video amplifier, a matching unit and an adder are added to the receiver, while the detector output is connected to the filter input (2i-1) through the matching unit , the outputs of which are connected to the corresponding inputs of the adder directly, and the other outputs to the corresponding inputs of the adder via phase-inversion blocks, the output of the adder being connected to the input of the video amplifier, as well as the fact that The loop is configured as band-pass filters combined at the input ti, each of which is set to 4acTOTyf 2, ri / -4iQ i where AND 1.2.3 ..., ig is the specified moment / time for detection of the useful signal.

Claims

FIG. 1 shows a structural electrical circuit of the proposed receiver in FIG. 2 - time diagrams that show his work. The receiver contains a high-frequency allocation unit 1, the output of which is connected to the input of the generator 2, and the output of the detector 2 through the matching unit 3 is connected to the filter 4, made in the form of the band-pass filters 5 combined at the input of the central filter, and 4 under; are connected directly to the corresponding inputs of the adder 6, and the other outputs to the corresponding inputs of the adder 6 through phase inversion blocks 7, the output of the adder b is connected to. The input of video amplifier 8, the receiver works as follows. The operation of the receiver is based on the formation of a short voltage pulse at a selected moment of the -1 signal realization by filtering, phasing and matching those frequency components that match the trigonometric i decomposition of the Dirac 5 function (ig on the segment Oi - ° b 4sli - ir; f - o) H In this case, the frequency components of the signal are filtered out with the frequencies Tt-2 and In l .f? ™ O O inverted nx in accordance with the multiplier of the (- 1) sign and added. With an increase in the number of filtered frequency components, the duration of the converted signal decreases and the resolution of the system increases, but its noise immunity decreases. The received radio pulse is amplified by a high-frequency allocation block 1, detected by detector 2, and a rectangular-shaped video pulse generated at the detector output is fed through a matching unit 3 to the inputs of the polarized filter 5. Figure 2 (D, b, d1) shows the responses received at the outputs of the strip fillers 5, when a pulse of rectangular shape is applied to the Hx inputs. The response of the second field filter 5 is inverted using the phase-inverse block 7 (a solid curve. The filtered and phased frequency components of the video pulse post. Are fed to the inputs of the adder 6, in which they are summed up. The response of the adder 6 uses the energy contained in the interval O -fip of the video pulse acting on the detector output. The proposed receiver has a higher resolution of the pulse than the known one. system f by reducing the duration of received signals with minimal loss of noise immunity.This increases the bandwidth of the communication channel and the likelihood of separate detection of signals with close arrival times, as well as increases the accuracy of measuring the signal time delay relative to the transmitter transmitter pulse. Claim 1. A receiver of pulse signals containing a high-frequency extraction unit, the output of which is connected to the detector input, An amplifier and a video amplifier, characterized in that, in order to increase the resolution, a matching unit and an adder are entered, the detector output is connected to the filter input through the matching unit, (2 and 1) whose outputs are connected to the corresponding inputs of the adder, and the others outputs - i to the corresponding inputs of the adder through phase-inversion blocks, with the output of the amor amounts connected to the input of the video amplifier. 2. Receiver according to claim 1, characterized in that the filter is made in the form of band-pass filters combined at the input, each of which is tuned to a frequency where 1, 2, 3 ...; tg is a predetermined time for detection of a useful signal. Sources of information taken into consideration at examination: 1. Mithev B. N. Determination of the temporal position of pulses in the presence of interference. M. | Soviet Radio, 1962, p. 119120.

2. Lezin Yu. S. Optimal filters and accumulators of pulse signals, Moscow, Soviet Radio, 1969, p. 28-46.