Influence of phase and clock synchronization errors on the noise immunity of coherent reception of signals with quadrature amplitude modulation
https://doi.org/10.32362/2500-316X-2021-9-2-35-43
Abstract
Signals with quadrature amplitude modulation (QAM) is widely used for high-speed transmission of information in many radio systems and, in particular, in digital television systems. In the receiver, which is part of the transceiver equipment of such systems, there is a block for the formation of reference oscillations and a clock synchronization block. Due to hardware instabilities and propagation conditions, phase and clock errors may occur, which cause additional errors during demodulation of the received signal, and which can significantly impair the noise immunity of the reception. The paper investigates the effect of phase and clock synchronization errors on the noise immunity of coherent reception of QAM signals. Using the methods of statistical radio engineering, the parameters of the distributions of processes in the receiver are obtained and the probability of bit error is estimated. The dependences of the probability of bit error on the magnitude of the phase error in the formation of the reference oscillations and on the relative displacement of the clock moments, as well as on the signal-to-noise ratio, are obtained. It is shown that these errors can greatly reduce the noise immunity of the reception, and with an increase in the positioning of the signals, this effect increases. If we assume that the admissible reception energy loss is 0.5 dB due to each of these errors, then the allowable phase error is from ~3° at M = 4 to ~1° at M = 64, and the allowable clock synchronization error, respectively, is from ~5% at M = 4 to ~2% at M = 64. To provide more stringent requirements for the magnitude of losses, the requirements for the indicated errors increase significantly.
About the Authors
G. V. Kulikov
MIREA – Russian Technological University
Russian Federation
Russian Federation
Gennady V. Kulikov, Dr. Sci. (Eng.), Professor, Professor of the Department of Radio Electronic Systems and Complexes, Institute of Radio Engineering and Telecommunication Systems
78, Vernadskogo pr., Moscow, 119454
Scopus Author ID 36930533000
A. A. Lelyukh
MIREA – Russian Technological University
Russian Federation
Russian Federation
Andrey A. Lelyukh, Postgraduate Student, Department of Radio Electronic Systems and Complexes, Institute of Radio Engineering and Telecommunication Systems
78, Vernadskogo pr., Moscow, 119454
E. V. Batalov
MIREA – Russian Technological University
Russian Federation
Russian Federation
Evgenii V. Batalov, Student, Department of Radio Electronic Systems and Complexes, Institute of Radio Engineering and Telecommunication Systems
78, Vernadskogo pr., Moscow, 119454
References
1. Digital Video Broadcasting (DVB). Implementation guidelines for the second generation system for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications; Part 1. S2 Extensions (DVB-S2X). Digital Video Broadcasting (DVB): DVB Document A171-1. March 2015. 115 p. URL: https://dvb.org/wp-content/uploads/2019/12/a171-1_s2_guide.pdf
2. Digital Video Broadcasting (DVB); Implementation guidelines for the second generation system for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications; Part 2. S2 Extensions (DVB-S2X). Digital Video Broadcasting (DVB): DVB Document A171-2. March 2015. 183 p. URL: https://dvb.org/?standard=dvb-s2x-implementation-guidelines
3. DVB. URL: https://www.dvb.org/standards/dvb-s2x
4. Nesterov A.V., Lelyukh A.A., Gavrikov N.S., Kulikov G.V. Assessment of energy characteristics of radio lines of perspective systems of satellite broadband access for airmobile subscribers. Zhurnal radioelektroniki = Journal of Radio Electronics.2019;1 (in Russ.). https://doi.org/10.30898/1684-1719.2019.1.11
5. Shakhtarin B.I., Ivanov A.A., Kobylkina P.I., Ryazanova M.A. Sinkhronizatsiya v radiosvyazi i radionavigatsii (Synchronization in radio communication and radio navigation). Moscow: Goryachaya liniya – Telekom; 2011. 256 p. (in Russ.). ISBN 978-5-99121-0177-3
6. Shakhtarin B.I. Sinkhronizatsiya v radiosvyazi i radionavigatsi (Synchronization in radio communication and radio navigation). Moscow: Gelios ARV; 2007. 256 р. (in Russ.). ISBN 978-5-85438-174-1
7. Boev N.M. Sinkhronizatsiya tsifrovykh sistem svyazi po signalam sputnikovykh radionavigatsionnykh sistem (Synchronization of digital communication systems using signals from satellite radio navigation systems). URL: https://uav-siberia.com/news/sinkhronizatsiyatsifrovykh-sistem-svyazi-po-signalam-sputnikovykhradionavigatsionnykh-sistem/
8. Artemenko A.A., Maltsev A.A., Rubtsov A.E. Effect of the carrier-phase estimation error on the bit-error rate in M-QAM data transmission systems. Vestnik Nizhegorodskogo universiteta im. N.I. Lobachevskogo = Vestnik of Lobachevsky University of Nizhni Novgorod. 2007;2:81–87 (in Russ.).
9. Pastukhov A.S., Ivanov Yu.A., Malyshev S.I. Bit error probability estimation in 4G communication systems. Elektrotekhnicheskie i informatsionnye kompleksy i sistemy= Electrical and Data processing Facilities and systems. 2009;5(4):28–34 (in Russ.).
10. Miroshnikova N.E. Phase and timing synchronization error on digital receiver properties. T-Comm: Telekommunikatsii i Transport = T-Comm: Telecommunications and Transportation. 2013;9:112–114 (in Russ.).
11. Kulikov G.V., Van Dung N. Influence of synchronization errors оn the noise immunity of coherent reception of M-PSK signals. Rossiiskii tekhnologicheskii zhurnal = Russian Technological Journal. 2019;7(5):47–61 (in Russ.). https://doi.org/10.32362/2500-316X-2019-7-5-47-61
12. Proakis J. Digital communications. 5th ed. McGrawHill Comp.; 2008. 1150 p. [Proakis J. Tsifrovaya svyaz’. Moscow: Radio i svyaz’; 2000. 800 p. ISBN 5-256-01434-X]
13. Kulikov G.V., Nesterov A.V., Lelyukh A.A. Interference immunity of reception of signals with quadrature amplitude shift keying in the presence of harmonic interference. Zhurnal radioelektroniki = Journal of Radio Electronics. 2018;11 (in Russ.). https://doi.org/10.30898/1684-1719.2018.11.9
Supplementary files
|
|
1. Example of distortion of 16 signals with quadrature amplitude modulation in the presence of an error in estimating the phase of the carrier oscillation | |
| Subject | ||
| Type | Исследовательские инструменты | |
View
(121KB)
|
Indexing metadata ▾ | |
The paper investigates the effect of phase and clock synchronization errors on the noise immunity of coherent reception of quadrature amplitude modulation signals. The dependences of the probability of bit error on the magnitude of the phase error in the formation of the reference oscillations and on the relative displacement of the clock moments, as well as on the signal-to-noise ratio, are obtained. It is shown that these errors can greatly reduce the noise immunity of the reception, and with an increase in the positioning of the signals, this effect increases.
Review
For citations:
Kulikov G.V., Lelyukh A.A., Batalov E.V. Influence of phase and clock synchronization errors on the noise immunity of coherent reception of signals with quadrature amplitude modulation. Russian Technological Journal. 2021;9(2):35-43. (In Russ.) https://doi.org/10.32362/2500-316X-2021-9-2-35-43
Views:
728
Email this article 