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CN 34-1054/N

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Improved interference cancellation method over Y channel

  • 1.

    Opening Project of Key Laboratory of Mine Informatization, Henan Polytechnic University, Jiaozuo 454000, China

  • 2.

    School of Computer Science and Technology, Henan Polytechnic University, Jiaozuo 454000, China

Cite this: JUSTC, 2015, 45(11): 943-948
https://doi.org/10.3969/j.issn.0253-2778.2015.11.010
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  • Received Date: June 07, 2015
  • Revised Date: September 15, 2015
  • Published Date: November 29, 2015
    Abstract
  • An interference cancellation method based on space-time code and codeword space alignment was proposed for MIMO Y interference channel, which consists of three users and a relay. An alamouti-based space-time coded is designed for each user. Codewords after space alignment pre-coding are sent to the relay in two steps during the multi access stage. The symbols estimated at the relay are encoded and are sent to three users in two steps during the broadcast stage. Both the multi access stage and the broadcast stage occupy four time slots, in which 24 independent modulated symbols are transmitted. Compared with the existing scheme for the same scene, the proposed scheme greatly reduces the amount of feedback, while keeping the same transmission rate. Simulation results demonstrate that the reliability of the proposed scheme is very close to that of the existing scheme for the same scene.
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