Joint Optimization for Source and Relay Precoding under Multiuser MIMO Downlink Channels

  title={Joint Optimization for Source and Relay Precoding under Multiuser MIMO Downlink Channels},
  author={Wei Xu and Xiaodai Dong and Wu-Sheng Lu},
  journal={2010 IEEE International Conference on Communications},
This paper investigates the joint precoding optimization problem for a relay-assisted multi- antenna downlink system. Aiming at multiuser sum capacity maximization, we first propose an iterative optimization algorithm which exploits quadratic programming approaches. We observe that the iterative method always yields the optimized precoding matrices which diagonalize the compound channel of the system at high SNR regimes. Inspired by this observation, we further develop an efficient source and… CONTINUE READING
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