RU2011132762A - METHOD FOR DEMODULATION AND FILTRATION OF PHASE-MODULATED SIGNALS AND DEVICE FOR ITS IMPLEMENTATION - Google Patents
METHOD FOR DEMODULATION AND FILTRATION OF PHASE-MODULATED SIGNALS AND DEVICE FOR ITS IMPLEMENTATION Download PDFInfo
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- RU2011132762A RU2011132762A RU2011132762/08A RU2011132762A RU2011132762A RU 2011132762 A RU2011132762 A RU 2011132762A RU 2011132762/08 A RU2011132762/08 A RU 2011132762/08A RU 2011132762 A RU2011132762 A RU 2011132762A RU 2011132762 A RU2011132762 A RU 2011132762A
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Abstract
1. Способ демодуляции и фильтрации фазомодулированных сигналов, состоящий в том, что демодулятор включают между источником фазомодулированных сигналов и низкочастотной нагрузкой и выполняют его из четырехполюсника, двухполюсного нелинейного элемента, фильтра нижних частот и разделительной емкости, фазомодулированный сигнал преобразовывают в амплитудно-фазомодулированный сигнал путем его подачи на правый или левый склон амплитудно-частотной характеристики, с помощью нелинейного элемента разрушают спектр амплитудно-фазомодулированного сигнала на высокочастотные и низкочастотные составляющие, с помощью фильтра нижних частот выделяют информационный низкочастотный сигнал, с помощью разделительной емкости устраняют постоянную составляющую информационного низкочастотного сигнала, амплитуда которого изменяется по закону изменения фазы фазомодулированного входного сигнала, информационный низкочастотный сигнал подают на низкочастотную избирательную нагрузку в виде дифференцирующей или интегрирующей цепи соответственно, отличающийся тем, что между выходом четырехполюсника и фильтром нижних частот в поперечную цепь вводят высокочастотную нагрузку, двухполюсный нелинейный элемент включают между источником фазомодулированных сигналов и входом четырехполюсника в продольную цепь, зависимости элементов матрицы сопротивлений четырехполюсника от частоты выбирают из условия формирования заданной формы и левого квазилинейного склона амплитудно-частотной характеристики высокочастотной части демодулятора с помощью следующих математических выражений:;,где;;;;;x, x=-x- оптимальные зависимости соотве1. A method for demodulating and filtering phase-modulated signals, which consists in the fact that the demodulator is turned on between a source of phase-modulated signals and a low-frequency load and is made of a four-terminal device, a two-pole nonlinear element, a low-pass filter and a separation capacitance, the phase-modulated signal is converted into an amplitude-phase-modulated signal by its supply to the right or left slope of the amplitude-frequency characteristic, using a nonlinear element destroy the spectrum of amplitude-phase modulation signal to the high-frequency and low-frequency components, using the low-pass filter, the information low-frequency signal is extracted, the dc component of the information low-frequency signal is eliminated with the help of a separation capacitance, the amplitude of which changes according to the law of phase change of the phase-modulated input signal, the information low-frequency signal is applied to the low-frequency selective load in the form differentiating or integrating circuit, respectively, characterized in that between the output even high-frequency load and a low-pass filter are introduced into the transverse circuit, a bipolar nonlinear element is connected between the phase-modulated signal source and the quadrupole input into the longitudinal circuit, the frequency dependencies of the quadrupole resistance matrix elements are selected from the conditions for the formation of the given shape and the left quasilinear slope of the amplitude-frequency characteristic of the high-frequency part demodulator using the following mathematical expressions:;, where ;;;;; x, x = -x- optimal dependencies respectively
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RU2011132762/08A RU2491711C2 (en) | 2011-08-03 | 2011-08-03 | Method of demodulating and filtering phase-modulated signals and apparatus for realising said method |
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RU2011132762/08A RU2491711C2 (en) | 2011-08-03 | 2011-08-03 | Method of demodulating and filtering phase-modulated signals and apparatus for realising said method |
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RU2011132762A true RU2011132762A (en) | 2013-02-10 |
RU2491711C2 RU2491711C2 (en) | 2013-08-27 |
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RU2011132762/08A RU2491711C2 (en) | 2011-08-03 | 2011-08-03 | Method of demodulating and filtering phase-modulated signals and apparatus for realising said method |
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Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2234644B (en) * | 1989-08-02 | 1993-12-08 | Plessey Co Plc | Modulator circuit |
RU2341866C2 (en) * | 2007-02-02 | 2008-12-20 | Федеральное Государственное учреждение Федеральный Государственный научно-исследовательский испытательный центр радиоэлектронной борьбы и оценки эффективности снижения заметности Минобороны России | Device for modulation of amplitude and phase of radio frequency signals |
RU2342769C2 (en) * | 2007-02-02 | 2008-12-27 | Федеральное Государственное учреждение Федеральный Государственный научно-исследовательский испытательный центр радиоэлектронной борьбы и оценки эффективности снижения заметности Минообороны России | Device for modulating amplitude and phase of radio-frequency signals |
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