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학술지 Self-Interference Cancellation for Shared Band Transmission in Nonlinear Satellite Communication Channels
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저자
정수엽, 유준규, 오덕길, 유희정
발행일
201712
출처
ETRI Journal, v.39 no.6, pp.771-781
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.17.0117.0220
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.
키워드
Nonlinear effect, Nonlinearity compensation, Satellite communication, Self-interference cancellation, Shared band transmission
KSP 제안 키워드
Adaptive compensation, Compensation scheme, Nonlinear effect(NLE), Nonlinearity compensation, Power Efficiency, Satellite channel, Saturation level, Self-Interference Cancellation, Spectral efficiency(SE), System performance, communication channel
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