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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Self-Interference Cancellation for Shared Band Transmission in Nonlinear Satellite Communication Channels

  • Jung, Sooyeob (Broadcasting and Media Research Laboratory, ETRI) ;
  • Ryu, Joon Gyu (Broadcasting and Media Research Laboratory, ETRI) ;
  • Oh, Deock-Gil (Broadcasting and Media Research Laboratory, ETRI) ;
  • Yu, Heejung (Department of Information and Communication Engineering, Yeungnam University)
  • Received : 2017.03.23
  • Accepted : 2017.07.28
  • Published : 2017.12.01
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Abstract

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.

Keywords

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