상세정보
학술대회
Blind Time and Frequency Synchronization in OFDM based Communication
- 발행일
- 200609
- 출처
- Vehicular Technology Conference (VTC) 2006 (Fall), pp.1567-1571
- 협약과제
- 05MR2800, 위성 IMT-2000+ 기술 개발, 안도섭
- 초록
- We present joint frame/symbol timing and carrier frequency offset estimation using the first data symbol in a frame, the first half of the first data symbol is identical to the second half in the time domain. Approximately maximum likelihood (ML) estimation is proposed for timing offset and a fractional part of the frequency offset based on both the first data symbol and its cyclic prefix (CP) in time domain. We also find a integer part of the frequency offset with virtual carriers in frequency domain. By the proposed method, the accuracy of the frame/symbol timing synchronization is definitely improved and the timing metric has a peak only at the correct start point of a frame. The performance of the proposed method is shown analytically and by simulation. © 2006 IEEE.
- KSP 제안 키워드
- Carrier frequency offset estimation, Cyclic prefix(CP), Maximum likelihood (ML) estimation, Symbol timing synchronization, Timing Metric, frequency domain(FD), time and Frequency synchronization, time frequency(T-F), time-domain, timing offset, virtual carriers(VC)