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학술대회
OFDM Channel Estimation with Timing Offset for Satellite Plus Terrestrial Multipath Channels
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- 발행일
- 200605
- 출처
- Vehicular Technology Conference (VTC) 2006 (Spring), pp.2592-2596
- 협약과제
- 05MR2800, 위성 IMT-2000+ 기술 개발, 안도섭
- 초록
- In this paper, we propose a discrete Fourier transform (DFT)-based channel estimation and timing synchronization to cope with satellite plus intermediate module repeater (IMR) channels. Conventional DFT-based channel estimations suffer from the timing offset and incorrect channel impulse response, and this results in means square error (MSE) floor of channel estimations. Moreover, timing synchronization accuracy is also degraded on IMR channels. We, therefor, propose an improved DFT-based channel estimation by deciding significant channel taps based on a threshold and we derive this threshold with respect to MSE. Using results from proposed channel estimation, we compensate residual timing offset of conventional timing estimation. © 2006 IEEE.
- KSP 제안 키워드
- Channel estimation(CE), DFT-based Channel Estimation, Improved DFT, Multipath channels, OFDM channel estimation, Synchronization accuracy, Timing estimation, channel impulse response(CIR), discrete Fourier Transform, timing offset, timing synchronization