IMPROVING OF CLIPPED SPEECH SIGNALS
Abstract
The authors describe the method of filter-phase shaping of single-band signal with deep amplitude limiting (clipping) which, after using filter method with coherent quadrature detection, allows to condition single-sideband of frequencies of oscillations with phase-shift keying (PSK) at 180° and thereby to reduce by half the band of frequencies of the transmitted signal, maintaining maximum interference immunity of communication. The method engineered by them permits to solve to a large extent the problems of shortage of radio frequencies. Some other technical solutions, allowing improvement of speech signal transmission, are also described.
About the Authors
A. A. Volkov
Moscow State University of Railway Engineering (MIIT), Moscow
Russian Federation
D. Sc. (Tech), professor
Russian Federation
D. Sc. (Tech), professor
V. A. Kuzukov
Moscow State University of Railway Engineering (MIIT), Moscow
Russian Federation
assistant lecturer at the department of radio engineering and electric communications
Russian Federation
assistant lecturer at the department of radio engineering and electric communications
References
1. Быховский М. А. О необходимости проведения реформ систем управления РЧС в России // Электросвязь. – 2008. – №9. – С.7–10. Byhovskiy M. A. On the necessity of reforming of the system of radio frequencies distribution management system in Russia [Oneobhodimosti provedeniya reform sistem upravleniya RChS v Rossii]. Elektrosvyaz’, 2008, № 9, pp.7–10.
2. Федеральный закон «О связи» от 7 июля 2003 г №123 – ФЗ// Российская газета. – 2003. – 7 июля. Federal law on Communications of July, 7, 2003 № 123 – FZ. Rossiyskaya gazeta, July, 7, 2003.
3. Петрович Н.Т. Передача дискретной информации в каналах с фазовой манипуляцией. – М.: Сов. радио, 1965. – 212 с. Petrovich N. T. Transmission of discrete information by the channels with phase-shift keying [Peredacha diskretnoy informatsii v kanalah s fazovoy manipulyatsiey]. Moscow, Sov. Radio publ., 1965, 212 p.
4. Петрович Н. Т., КозленкоН. И. Передача клиппированных речевых сигналов с помощью фазовой телеграфии // Радиотехника. – 1964. –№11, т. 19. – С. 73–78. Petrovich N. T., Kozlenko N. I. Transmission of clipped speech signals with the help of phase telegraph [Peredacha klippirovannyh rechevyh signalov s pomosch’yu fazovoy telegrafii]. Radiotehnika, 1964, № 11, vol.19, pp. 73–78.
5. Волков А. А. Радиопередающие устройства. – М: Маршрут, 2002. – С.143–145. Volkov A. A. Radio transmitting devices [Radioperedayuschie ustroystva]. Moscow, Marshrut publ., 2002, pp.143–145.
6. Авторское свидетельство СССР №1494202. Формирователь однополосного сигнала сугловой модуляцией / А. А. Волков. Приоритет от20.10.1987. Опубл. в БИ №26 за 1989 г. Author’s certificate of the USSR № 1494202. Shaper of single-band signal with angular modulation [Formirovatel’ odnopolosnogo signalasuglovoymodulyatsiey]. A. A. Volkov. Priority of 20.10.1987. Published in BI№ 26 of 1989.
7. Патент РФ на изобретение №2464193. Система железнодорожной радиосвязи / А.А. Волков. Приоритет от 24.12.2010. Patent of Russian Federation for invention № 2464193. System of railways’ radio communications [Sistema zheleznodorozhnoy radiosvyazi]. A. A. Volkov. Priority of 24.12.2010.
8. Зюко А. Г., Кловский Д. Д., Коржик В. И., Назаров М. В. Теория электрической связи. – М.: Радио и связь, 1998, 432 с. Zyuko A.G., Klovskiy D. D., Korzhik V. I., Nazarov M. V. Theory of electric communication [Teoriya elektricheskoy svyazi]. Moscow, Radio i svyaz’ publ., 1998, 432 p.
Review
For citations:
Volkov A.A., Kuzukov V.A. IMPROVING OF CLIPPED SPEECH SIGNALS. World of Transport and Transportation. 2013;(5):38-43. (In Russ.)
Views:
242
Email this article 