Computer Science ›› 2015, Vol. 42 ›› Issue (5): 157-159.doi: 10.11896/j.issn.1002-137X.2015.05.031

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Improved Interference Cancellation Method over X Channel

TIAN Xin-ji and LU Jing   

  • Online:2018-11-14 Published:2018-11-14

Abstract: An interference cancellation method based on space-time code was proposed for X channel with four antennas at each user.Each user employs rate-2 space-time block code.The unwanted codewords are eliminated through the introduction of zero elements at each user’ transmit signals.The wanted codewords from two users keep orthogonal through the pre-coding for each codeword,so the interference between wanted codewords is cancelled.Compared with the existing scheme for the same scene,our proposed scheme greatly reduces feedback amount,while keeping the same transmission efficiency.Simulation results demonstrate the validity of the proposed scheme.

Key words: X Channel,Space-time block code,Precoding,Interference cancellation,Feedback amount

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