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Fully digital BPSK demodulator for satellite supressed carrier telecommand system
Author(s) -
Pereira de Lucena Antonio Macilio,
Prudêncio de Almeida Filho Magno,
Gomes de Figueredo Caio,
Braga Pimentel Diego,
Sales do Nascimento Rios Clauson,
Tavares Ferreira da Silva Francisco de Assis
Publication year - 2016
Publication title -
international journal of satellite communications and networking
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.388
H-Index - 39
eISSN - 1542-0981
pISSN - 1542-0973
DOI - 10.1002/sat.1188
Subject(s) - demodulation , synchronizer , computer science , baseband , phase shift keying , electronic engineering , communications satellite , carrier recovery , synchronization (alternating current) , bit error rate , sampling (signal processing) , signal (programming language) , telecommunications , bandwidth (computing) , satellite , detector , decoding methods , engineering , distributed computing , channel (broadcasting) , programming language , aerospace engineering
Summary In this paper, we present the design of a fully digital binary phase shift keying demodulator for application in satellite high‐rate suppressed carrier telecommand system. The proposed system digitalizes the received signal in the intermediate frequency stage using bandpass sampling technique, and the resulting baseband signal is used to synchronization of symbol and phase and to bit detection. The design of all functional modules is presented in details. Another innovation presented in this work is the inclusion of a non‐linearity in the phase synchronizer module to permit its operation independent from the signal amplitude. Moreover, aiming the characterization and performance evaluation of the system, we do some original mathematical analyses. Finally, test results show that the demodulator complies all the project requirements, and the prototype implementation loss, in terms of bit energy to noise power density ratio, is less than 0.3 dB. Copyright © 2016 John Wiley & Sons, Ltd.