SU771901A1

SU771901A1 - Device for receiving broad-band signals with linear frequency modulation

Info

Publication number: SU771901A1
Application number: SU782670338A
Authority: SU
Inventors: Николай Петрович Суворов; Валентин Алексеевич Вязовский
Original assignee: Харьковское Высшее Военное Командное Училище Им. Маршала Советского Союза Крылова Н.И.
Priority date: 1978-10-02
Filing date: 1978-10-02
Publication date: 1980-10-15

Description

1one

Изобретение относитс к технике св зи и может использоватьс в системах радиосв зи и радиотелеметрии.The invention relates to communication technology and can be used in radio communication systems and radio telemetry.

Известно устройство дл приема широкополосных сигналов с линейной частотной модул цией, содержащее приемник , выход которого подключен к первым входам смесителей,вторые входы которых соединены с выходами соответству. ющих гетеродинов, а выходы смесителей подключены ко входам сжимающих фильтров , выходы которых соединены со входами решающего блока fl .A device for receiving broadband signals with linear frequency modulation is known, comprising a receiver, the output of which is connected to the first inputs of mixers, the second inputs of which are connected to the outputs accordingly. local oscillators, and the outputs of the mixers are connected to the inputs of compression filters, the outputs of which are connected to the inputs of the decision block fl.

Однако в известном устройстве не обеспечиваетс прием достаточно боль-15 того объема информации-,However, in a known device, a sufficiently large amount of information is not sufficiently received;

Целью изобретени вл етс увеличение объема принимаемой информации.The aim of the invention is to increase the amount of received information.

Дл этого в устройство дл приема 20 широкополосных сигналов с линейной частотной модул цией, содержгицее приемник , выход которого подключен к .первым входам смесителей, вторые входы оторых соединена с выходами со- 25 ответствующих гетеродинов, а выхоф смесителей подключены ко входам сжимающих фильтров, выходы которых соединены со входами решающего блока, введены последовательно соединенные 30For this, the device for receiving 20 broadband signals with linear frequency modulation contains a receiver whose output is connected to the first inputs of mixers, the second inputs that are connected to the outputs of 25 corresponding local oscillators, and the output mixers are connected to the inputs of compression filters whose outputs connected to the inputs of the decision block, 30 are connected in series

частотный детектор, дифференцирующий блок и формирователь импульсов, выход которого подключен к дополнительному входу решающего блока,, при этом выходы смесителей соединены со входами частотного детектора.a frequency detector, a differentiating unit and a pulse shaper, the output of which is connected to the auxiliary input of the decision unit, while the outputs of the mixers are connected to the inputs of the frequency detector.

На чертеже изобргикена структурна электрическа схема предложенного устройства .дл приема широкополосных сигналов с линейной частотной модул цией ,In the drawing, an isobriken structural electrical circuit of the proposed device for receiving broadband signals with linear frequency modulation,

Предложенное устройство содержит приемник If смесители 2,3, гетеродины 4,5, сжимающие фильтры 6,7, решающий блок 8, частотный детектор 9, дифференцирующий блок 10, формирователь 11 импульсов.The proposed device includes a receiver If mixers 2.3, local oscillators 4.5, compression filters 6.7, crucial block 8, frequency detector 9, differentiating block 10, driver 11 pulses.

Устройство дл приема широкополосных сигналов с линейной частотной модул цией работает следующим образом .A device for receiving broadband signals with linear frequency modulation operates as follows.

Claims

The signals received by the receiver 1 after frequency conversion in mixers 2 and 3 are fed to compression filters 6 and 7. At the same time, signals with linear frequency modulation (chirp) from the outputs of mixers 2 and 3 are fed to frequency detector 9 and the resultant shape . This voltage is applied to the input of the differentiating unit 10, the output of which produces straight angle pulses. At the output of the driver of 11 pulses, pulses appear at the instants of time corresponding to the moment-ntam of the change of sign of the slope of the functions of the frequency modulation of the chirp signals. These pulses, together with the information pulses from the outputs of the compression filters B and 7, arrive at the corresponding inputs of the solver unit 8, providing clock synchronization when a decision is made. The proposed device for receiving broadband signals with linear frequency modulation eliminates the need for special synchronization chirp signals, which increases the synchronization of information signals, thereby increasing the amount of received information. Apparatus of the Invention A device for receiving wide-frequency signals with linear frequency modulation, comprising a receiver whose output is connected to the first inputs of mixers, the second inputs of which are connected to the outputs of the respective local oscillators, and the outputs of the mixers are connected to the inputs of a compression filter whose outputs are connected to the inputs of a decision block, This means that, in order to increase the volume of received information, serially connected frequency detector, differentiating unit and impulse shaper were introduced. owls, the output of which is connected to the auxiliary input of the decision block, the outputs of the mixers are connected to the inputs of the frequency detector. Sources of information taken into account in the examination 1. US patent No. 3766477, cl. 1779-15, 1973 (prototype).

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