상세정보
학술지
Self-Interference Cancellation for Shared Band Transmission in Nonlinear Satellite Communication Channels
- 발행일
- 201712
- 출처
- ETRI Journal, v.39 no.6, pp.771-781
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 17HR1300, 동일 위성채널 전송 및 주파수 공유기술 개발, 오덕길
- 초록
- For efficient spectral utilization of satellite channels, a shared band transmission technique is introduced in this paper. A satellite transmits multiple received signals from a gateway and terminal in the common frequency band by superimposing the signals. To improve the power efficiency as well as the spectral efficiency, a travelling wave tube amplifier in the satellite should operate near the saturation level. This causes a nonlinear distortion of the superimposed transmit signal. Without mitigating this nonlinear effect, the self-interference cannot be properly cancelled and the desired signal cannot be demodulated. Therefore, an adaptive compensation scheme for nonlinearity is herein proposed with the proper operation scenario. It is shown through simulations that the proposed shared band transmission approach with nonlinear compensation and self-interference cancellation can achieve an acceptable system performance in nonlinear satellite channels.
- KSP 제안 키워드
- Adaptive compensation, Compensation scheme, Nonlinear effect(NLE), Power Efficiency, Satellite channel, Saturation level, Self-Interference Cancellation, Spectral efficiency(SE), System performance, communication channel, frequency band
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