상세정보
학술대회
Residual Frequency Offset Compensation-embedded Turbo Decoder
- 발행일
- 200703
- 출처
- Wireless Communications and Networking Conference (WCNC) 2007, pp.100-104
- 협약과제
- 06MR2900, 위성 IMT-2000+ 기술 개발, 안도섭
- 초록
- We propose a modified iterative turbo decoder, which inherently compensates the residual frequency offset remained in the decoder input. Based on the recently proposed phase offset compensation scheme which embeds phase compensation into iterative turbo decoding, we extend it to cover up to the frequency offset compensation. At each iteration, we estimate the residual frequency offset remained in the soft decoder output and compensate it for the next iteration. As iteration goes on, frequency offset is gradually and drastically reduced. Consequently, the severe turbo decoding failure due to even small residual frequency offset can be significantly recovered and then, almost the ideal decoding performance is achieved. Especially for power limited communications under very low SNR environment where the even tiny frequency offset is critical to turbo decoding, the proposed scheme is efficient since it does not require additional transmission power for compensation. © 2007 IEEE.
- KSP 제안 키워드
- Compensation scheme, Frequency offset compensation, Phase offset, Residual frequency offset, Turbo decoder, Turbo decoding, decoding performance, low SNR environment, phase compensation, transmission power