RU2013137345A - METHOD FOR DEMODULATION OF FREQUENCY-MODULATED SIGNALS - Google Patents
METHOD FOR DEMODULATION OF FREQUENCY-MODULATED SIGNALS Download PDFInfo
- Publication number
- RU2013137345A RU2013137345A RU2013137345/07A RU2013137345A RU2013137345A RU 2013137345 A RU2013137345 A RU 2013137345A RU 2013137345/07 A RU2013137345/07 A RU 2013137345/07A RU 2013137345 A RU2013137345 A RU 2013137345A RU 2013137345 A RU2013137345 A RU 2013137345A
- Authority
- RU
- Russia
- Prior art keywords
- samples
- signal
- low
- output
- signals
- Prior art date
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Способ демодуляции частотно-модулированных сигналов, заключающийся в том, что частотно-модулированный сигнал преобразуют в цифровую форму, получают два квадратурных сигнала умножением отсчетов сигнала на отсчеты двух опорных колебаний, сдвиг по фазе между которыми составляет 90°, вычисляют низкочастотные составляющие каждого из полученных квадратурных сигналов, вычисляют значение модуля отсчетов сигнала с выходов фильтров низких частот, отличающийся тем, что осуществляют сглаживающую фильтрацию модуля сигнала, при этом каждый квадратурный сигнал пропускают через цифровой дифференцирующий фильтр, отсчеты сигналов с выходов низкочастотных и дифференцирующих фильтров прореживают, прореженные реальные отсчеты с выхода низкочастотного фильтра умножают на мнимые отсчеты с выхода дифференцирующего фильтра, а мнимые отсчеты с выхода низкочастотного фильтра умножают на реальные отсчеты с выхода дифференцирующего фильтра, результаты умножения вычитают, осуществляют деление на сглаженный модуль сигнала.The method of demodulating frequency-modulated signals, namely, that the frequency-modulated signal is converted to digital form, two quadrature signals are obtained by multiplying the signal samples by the samples of two reference oscillations, the phase shift between which is 90 °, low-frequency components of each of the obtained quadrature signals are calculated signals, calculate the value of the module of the samples of the signal from the outputs of the low-pass filters, characterized in that they carry out smoothing filtering of the signal module, with each quad The tour signal is passed through a digital differentiating filter, the samples of the signals from the outputs of the low-pass and differentiating filters are thinned out, the decimated real samples from the output of the low-pass filter are multiplied by imaginary samples from the output of the differentiating filter, and the imaginary samples from the output of the low-pass filter are multiplied by real samples from the output of the differentiating filter, the results of the multiplication are subtracted, the division into a smoothed signal module is performed.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013137345/07A RU2572105C2 (en) | 2013-08-08 | 2013-08-08 | Method of demodulation of frequency-modulated signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013137345/07A RU2572105C2 (en) | 2013-08-08 | 2013-08-08 | Method of demodulation of frequency-modulated signals |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2013137345A true RU2013137345A (en) | 2015-02-20 |
RU2572105C2 RU2572105C2 (en) | 2015-12-27 |
Family
ID=53281961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2013137345/07A RU2572105C2 (en) | 2013-08-08 | 2013-08-08 | Method of demodulation of frequency-modulated signals |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU2572105C2 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5220583A (en) * | 1988-10-03 | 1993-06-15 | Motorola, Inc. | Digital fm demodulator with a reduced sampling rate |
US6304136B1 (en) * | 1999-03-03 | 2001-10-16 | Level One Communications, Inc. | Reduced noise sensitivity, high performance FM demodulator circuit and method |
RU2168281C2 (en) * | 1999-08-18 | 2001-05-27 | Корпорация "Самсунг Электроникс" | Process of formation of quadrature channels and device for its realization ( versions ) |
KR100667648B1 (en) * | 2003-05-22 | 2007-01-12 | 도쿠리쓰교세이호징 가가쿠 기주쓰 신코 기코 | Fm signal demodulation method and device thereof |
-
2013
- 2013-08-08 RU RU2013137345/07A patent/RU2572105C2/en active IP Right Revival
Also Published As
Publication number | Publication date |
---|---|
RU2572105C2 (en) | 2015-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107063080B (en) | Phase lock-in detecting method and device for sinusoidal phase modulation | |
JP2017506012A5 (en) | ||
RU2013137345A (en) | METHOD FOR DEMODULATION OF FREQUENCY-MODULATED SIGNALS | |
RU2014137064A (en) | Relative phase modulation pseudo random signal demodulator | |
RU2009108762A (en) | ACTIVE INTERFERENCE COMPENSATION DEVICE | |
RU2008103078A (en) | NOISE CORRELATION RECEIVER WITH MINIMUM FREQUENCY MANIPULATION | |
RU2015138626A (en) | METHOD FOR MEASURING PHASE SHIFTS BETWEEN TWO HARMONIC SIGNALS OF THE SAME FREQUENCY | |
RU167006U1 (en) | AC VOLTAGE TRANSMITTER | |
RU2014130671A (en) | METHOD AND DEVICE OF BROADBAND COMMUNICATION WITH HIGH LEVEL (GALVANIC) DISCHARGE | |
RU2013110981A (en) | DEVICE FOR REGISTRATION OF ARTERIAL PULSATION OF BLOOD | |
RU2010115998A (en) | 180 ° Coherent Radio Signal Detector | |
RU2011119371A (en) | METHOD FOR DEMODULATION OF FIBER INTERFEROMETER SIGNAL | |
RU124461U1 (en) | Coherent Signal Detector with 180 ° Phase Manipulation | |
RU2016140972A (en) | A device for receiving quadrature amplitude manipulation signals | |
RU2013128160A (en) | METHOD OF FREQUENCY CONVERSION AND CONVERTER FOR ITS IMPLEMENTATION | |
RU2010118571A (en) | STRUCTURAL INTERFERENCE COMPENSATION DEVICE | |
RU2015122227A (en) | DEVICE FOR QUASICOGENT RECEPTION OF PHASOMANIPULATED BINARY SIGNALS | |
Chandrika et al. | Signal distortion due to low-pass filtering in phase generated carrier demodulation schemes for interferometric sensors | |
RU2015149940A (en) | DIGITAL FILTER SYNTHESIS METHOD | |
RU2013141781A (en) | FREQUENCY CONVERTER | |
RU2011130806A (en) | PHASOMANIPULATED SIGNAL DETECTOR | |
RU2017144073A (en) | METHOD FOR COGERENT DETECTION OF SIGNALS WITH ABSOLUTE PHASE MANIPULATION FOR 180˚ AND A DEVICE FOR ITS IMPLEMENTATION | |
RU2016146962A (en) | Method for detecting a linear frequency modulated signal | |
RU2003118050A (en) | DEVICE FOR SQUARE RECEIVING OF FREQUENCY-MANIPULATED SIGNALS | |
RU2010139880A (en) | HETERODYNE FREQUENCY CONVERTER PHASOMETER |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA92 | Acknowledgement of application withdrawn (lack of supplementary materials submitted) |
Effective date: 20150626 |
|
MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20180809 |
|
NF4A | Reinstatement of patent |
Effective date: 20190913 |