SU687620A1

SU687620A1 - Discrete signal receiver

Info

Publication number: SU687620A1
Application number: SU782628801A
Authority: SU
Inventors: Владимир Иванович Васильев; Александр Петрович Буркин; Сергей Жанович Кишенский; Андрей Анатольевич Пичугин
Original assignee: Московский Институт Инженеров Гражданской Авиации
Priority date: 1978-06-14
Filing date: 1978-06-14
Publication date: 1979-09-25

Description

(34) ПРИЕМНИК ДИСКРЕТНЫХ СИГНАЛОВ(34) DISCRETE SIGNAL RECEIVER

1one

Изобретение относитс к электросв зи и может использоватьс в системах передачи дискретной информации и теле графин.The invention relates to telecommunications and can be used in discrete information transmission systems and a body of a decanter.

Известен приемник дискретных сигналов , содержащий не менее трех подканалов , каждый из KOTOpbtx состоит из последовательно соединенньк фильтра и амплитудного детектора, вьсход каждого амплитудного детектора первого и второго подканалов подключен через последовательно соединенные блок сравнени и Пороговый элемент ко входам решающего блока 1.The known receiver of discrete signals containing at least three subchannels, each of KOTOpbtx consists of a serially connected filter and an amplitude detector, the flow of each amplitude detector of the first and second subchannels is connected through the serially connected comparison unit and the Threshold element to the inputs of a decision unit 1.

Однако известный приемник дискретных сигналов требует затраты значительного времени настройки и недостаточно помехоустойчив.However, the known receiver of discrete signals requires a considerable amount of setup time and is not sufficiently robust.

Цель изобретени - повышение помехустойчивости и сокращение времени настройки .The purpose of the invention is to increase noise immunity and reduce setup time.

Дл этого в приемник дискретных сигналов , содержащий не менее трех подканалов , каждый из которых состоит изTo do this, a discrete signal receiver containing at least three subchannels, each of which consists of

после доза те соединенных фильтра и и амплитудного детектора, выход каждого амплитудного детектора первого и второго подканалов подключен через последовательно соединенные блок сравнени и пороговый элемент ко входам решающего блока, введен инвертор, при этом выход амплитудного детектора третьего подканала подключен через инвертор к другим входам блоков сравнени первого и второго подканалов.After the dose of the connected filter and the amplitude detector, the output of each amplitude detector of the first and second subchannels is connected via a serially connected comparison unit and a threshold element to the inputs of the decision unit, an inverter is inserted, and the output of the amplitude detector of the third subchannel is connected first and second subchannels.

На чертеже представлена структурна электрическа схема предложенного устройства .The drawing shows a structural electrical circuit of the proposed device.

Claims

The receiver of discretes to signals consists of at least three subchannels 1-3, each of which contains; filter 4 and amplitudes a 1st detector 5, the output of which is connected to the decision block 8 through the comparison unit G and the threshold element 7, and the amplitude detector 5 of the third sub-canal 3 connects q block comparison of 6 porgoy and BTOpoix) gyulanals 1 and 2 through the inverter 9. 30 The hustler works sporadically, since the impulse noise spectrum is significantly wider than the transmitting bandwidth of the filters on the receiver, and the response of the filters is determined, which is determined by the receiver's frequency response and spectral response. In the absence of a polar signal, the interference action causes the appearance at the outputs of the comparison blocks 6 signals: X, ft) 7fln Xjft) -0. If the frequency characteristics of filters 4 are identical, then the output envelope of the amplitude detectors 5 has the same appearance. At the same time, if certain transmittance coefficients of the amplitude detectors 5 are selected at zero, the levels of srabapgvani threshold elements 7, none of them does not work regardless of the characteristics of the pulse noise. The decisive key 8, when affected by interference, does not produce any of the allowed symbol values. When transmitting a useful signal, the balance of voltages at the outputs of the comparison block 6 is disturbed, the signals at their outputs become X, (t) 0 and Xz (i) 0. Moreover, the last equality is similar to the impact of only impulse noise. Consequently, the threshold element 7 of the first subchannel I is triggered. 04 Solver block 8 sends the corresponding character of the output alphabet. To the input of the inverter 9, you can connect the output of the amplitude detector 5 of any subchannel 1-3. Such a choice allows, when the characteristics of subchannels 1-3 are not identical, to minimize the influence of the non-uniformity of the characteristics of the communication lines on the noise immunity of the receiver. DETAILED DESCRIPTION A discrete signal receiver comprising at least three subchannels, each of which consists of a series-connected filter and an amplitude detector, the output of each amplitude detector, the first and second sub-channels are connected via a series-connected comparison unit and a threshold element to the inputs of the decision unit, different in that, with the noise immunity improving circuit and reducing the screech tuning, an inverter was inserted, and the output of the amplitude detector of the third sub-channel of the sub-channels through and vertor to other blocks inputs srashevi first and second subchannels. Sources of information received in the foregoing during the examination I. USSR Author's Certificate No. 543161. kp. H O4 B 1 / 1O, 19.75 (prototype).