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Estimation of Frequency Offset in TDMA-Based Satellite Systems  

Kim Jong-Moon (LG전자 DTV연구소, 서울대학교 전기공학부 송수신기술연구실)
Lee Yong-Hwan (LG전자 DTV연구소, 서울대학교 전기공학부 송수신기술연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.4C, 2006 , pp. 364-370 More about this Journal
Abstract
It is required for correct signal detection to accurately maintain the synchronization of frequency and timing in a TDMA system. In this paper, we consider nondecision-aided estimation of frequency offset for the transmission of QPSK signal in a TDMA-based satellite system. The proposed scheme estimates the phases of two parts in the burst and then estimates the frequency offset based on the difference between the two estimated phases. Thus, it can provides performance comparable to that of conventional schemes, while significantly reducing the implementation complexity, The performance of the proposed scheme is analyzed and verified by computer simulation, when applied to a GSM based geostationary earth orbit mobile radio(GMR) system.
Keywords
GMR; satellite system; TDMA; carrier recovery; frequency offset;
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