radioelectronicsИзвестия высших учебных заведений России. РадиоэлектроникаJournal of the Russian Universities. Radioelectronics1993-89852658-4794Saint Petersburg Electrotechnical Universityradioelectronics-160Research ArticleРАДИОТЕХНИЧЕСКИЕ СРЕДСТВА ПЕРЕДАЧИ, ПРИЕМА И ОБРАБОТКИ СИГНАЛОВRADIO ELECTRONIC FACILITIES FOR SIGNAL TRANSMISSION, RECEPTION AND PROCESSINGРазработка и исследование методов демодуляции частотно-манипулированных сигналовDevelopment and Study of Demodulation Techniques for Frequency Manipulated SignalsКаплунД. И.KaplunD. I.

кандидат технических наук (2009), доцент кафедры автоматики и процессов управления

Ph.D. on Engineering (2009), Associate Professor of the Department of Automation and Control Processes

mitya_kapl@front.ruГульванскийВ. В.GulvanskiyV. V.

магистр техники и технологии по направлению "Управление в тех­ нических системах" (2015), аспирант кафедры автоматики и процессов управления

Master's Degree in Engineering and Technology in Engineering System Management (2015), postgraduate student of the Department of Automation and Control Processes

vvgulvanskii@gmail.comКанатовИ. И.KanatovI. I.

кандидат технических наук (1974), доцент (1980) кафедры автоматики и про­ цессов управления

Ph.D. in Engineering (1974), Associate Professor (1980) of the Department of Automation and Control Processes

iikanatov@etu.ruКлионскийД. М.KlionskiyD. M.

кандидат технических наук (2013), доцент кафедры математического обеспечения и применения ЭВМ

Ph.D. in Engineering (2013), Associate Professor of the Department of Software and Computer Application

klio2003@list.ruЛапицкийВ. Ф.LapizkiyV. F.

кандидат технических наук (2000), доцент (2001), начальник отдела

Ph.D. in Engineering (2000), Associate Professor (2001). Head of the Department

lvf333@ya.ruБобровскийВ. И.BobrovskiyV. I.

доктор технических наук (2009), доцент (2010), Начальник отдела ПАО

D.Sc. in Engineering (2009), Associate Professor (2010), Head of Department

v.bobrovskiy@ntc1.inteltech.ruФроловК. В.FrolovK. V.

магистр по направлению "Цифровые, микроволновые и оптиче­ские системы связи" (2016), инженер 2-й категории

ster’s Degree in Digital, Microwave and Optical Communication Systems (2016), 2nd Class Engineer

intelteh@inteltech.ruСкворцовА. К.SkvortzovA. K.

инженер по специальности "Многоканальные телекоммуникационные систе­ мы" (2010, Военная академия связи им. С. М. Буденного), инженер 2-й категории

Engineer in Multichannel Telecommunication Systems (2010, Military Academy of Communications (Saint-Petersburg)), 2nd Class Engineer

intelteh@inteltech.ruСанкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)РоссияSaint Petersburg Electrotechnical University "LETI"Russian FederationПАО "Интелтех"РоссияPJSC "Inteltech"Russian Federation201728042017021116Copyright © Каплун Д.И., Гульванский В.В., Канатов И.И., Клионский Д.М., Лапицкий В.Ф., Бобровский В.И., Фролов К.В., Скворцов А.К., 20172017Каплун Д.И., Гульванский В.В., Канатов И.И., Клионский Д.М., Лапицкий В.Ф., Бобровский В.И., Фролов К.В., Скворцов А.К.Kaplun D.I., Gulvanskiy V.V., Kanatov I.I., Klionskiy D.M., Lapizkiy V.F., Bobrovskiy V.I., Frolov K.V., Skvortzov A.K.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://re.eltech.ru/jour/article/view/160

Предложены различные методы демодуляции частотно-манипулированных сигналов и произведено их сравнение по критерию количества ошибок демодулированного сигнала относительно сигнала до модуляции при различном отношении "сигнал/шум".

The goal of our research is development and study of different demodulation techniques for a frequency shift keyed signals. The signal under study is a frequency-shift keyed (FSK) signal when the information signal regulates the carrier frequency. We consider a model imitating data transmission channels and allowing us to perform error counting. The data transmission channels have ideal synchronization. Several techniques of demodulator design are introduced for demodulating frequency-shift keyed (FSK) signal and we compare the techniques using the criterion of error number of a demodulated signal relative to a signal prior to modulation for different signal-to-noise ratio. Signal-to-noise ratio is calculated as a ratio of the energy of the information symbol to the noise power spectral density. We have tested different demodulation techniques with different signal-to-noise ratio and produced a table containing information on demodulation accuracy for different techniques. Overall, we have simulated 100 sec. of continuous bit packages. We indicate that the best results for signal-to-noise ratio exceeding 5 dB are provided with the technique based on double correlation, and for signal-to-noise ratio less than 5 dB - with the technique based on the fast Fourier transform.

Демодуляциячастотно-манипулированный сигналбыстрое преобразование Фурьеавтокорреляционная функциядвойная корреляцияDemodulationFrequency-Shift Keyed SignalsFast Fourier TransformAutocorrelation FunctionDouble CorrelationReferencesShannon C. E. A mathematical theory of communication // Bell System Technical J. 1948. Vol. 27. P. 379-423 and 623-656.Shannon C. E. A Mathematical Theory of Communication. Bell System Technical J., 1948, vol. 27, pp. 379¬ 423 and 623-656.Bond F. E., Meyer H. F. Intermodulation effects in limiter amplifier repeaters // IEEE Trans. Comm. 1970. Vol. COM-18. P. 127-135.Bond F. E., Meyer H. F. Intermodulation Effects in Limiter Amplifier Repeaters. IEEE Trans. Comm., 1970, vol. COM-18, pp. 127-135.Boashash B. Time-Frequency Signal Analysis and Processing - A Comprehensive Reference. Oxford: Elsevier Science, 2003. 771 p.Boashash B. Time-Frequency Signal Analysis and Processing - A Comprehensive Reference. Oxford, Elsevier Science, 2003, 771 p.Croxton F. E., Cowden D. J., Klein S. Applied General Statistics. London: Sir Isaac Pitman and Sons, 1968. 754 p.Croxton F. E., Cowden D. J., Klein S. Applied General Statistics. London, Sir Isaac Pitman and Sons, 1968, 754 p.Tetsuya Shimamura, Ngoc Dinh Nguyen. Autocorrelation and double autocorrelation based spectral representations for a noisy word recognition system // INTERSPEECH 2010, 11th Annu. Conf. of the International Speech Communication Association, Makuhari, Chiba, Japan, Sept. 26-30, 2010. Red Hook: Curran Associates, Inc., 2010. P. 1712-1716.Tetsuya Shimamura, Ngoc Dinh Nguyen. Autocorrelation and Double Autocorrelation Based Spectral Representations for a Noisy Word Recognition System. INTERSPEECH 2010, 11th Annu. Conf. of the International Speech Communication Association, Makuhari, Chiba, Japan, Sept. 26-30, 2010. Red Hook, Curran Associates, Inc., 2010, pp. 1712-1716.Rodgers J. L., Nicewander W. A. Thirteen ways to look at the correlation coefficient // The American Statistician. 1988. Vol. 42, № 1. P. 59-66.Rodgers J. L., Nicewander W. A. Thirteen ways to look at the correlation coefficient. The American Statistician, 1988, vol. 42, no. 1, pp. 59-66.

The authors declare that there are no conflicts of interest present.