상세정보
학술지
Self-interference cancellation for two-way amplify-and-forward relaying systems
- 저자
- 신준우, 서방원
- 발행일
- 201401
- 출처
- IET Communications, v.8 no.7, pp.1024-1031
- ISSN
- 1751-8628
- 출판사
- IET
- 협약과제
- 14MI9100, (통합)초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
- 초록
- This study proposes implementation of two-way amplify-and-forward relaying systems in practical environments where signals from two source nodes arrive at a relay with different propagation delays. The authors develop a selfinterference delay and channel estimation technique applicable for practical environments. Whereas receiver processing in conventional schemes is performed in the baud rate domain, in this work, oversampling (or Nyquist sampling) is introduced at the receiver to avoid any energy loss in the desired signal. They derive the proposed estimator in the oversampled domain on the basis of the least square criterion and also provide a design guide for the oversampling ratio and the application of a self-interference canceller. They observe from the author's analysis and simulation results that an oversampling of 2 is sufficient, and it is not preferable to use a self-interference canceller when L/(N쨌ISNR) is greater than 1, where the interference-to-signal-plus-noise ratio (ISNR) denotes the power ratio of the self-interference to the desired signal plus noise, L is the channel length and N is the number of symbols in one time slot. © The Institution of Engineering and Technology 2014.
- KSP 제안 키워드
- Analysis and simulation, Baud rate, Channel Length, Channel estimation(CE), Estimation Technique, Least Squares(LS), Least square criterion, Nyquist sampling, Oversampling ratio, Propagation delay, Self-Interference Cancellation