Spectral optimization for beamforming in MIMO relay wireless networks

  title={Spectral optimization for beamforming in MIMO relay wireless networks},
  author={A. H. Phan and Hoang Duong Tuan and H. H. Kha},
  journal={2012 Fourth International Conference on Communications and Electronics (ICCE)},
The amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay beamforming problems are conventionally formulated as nonconvex quadratic programs, and then the semidefinite relaxation (SDR) technique can be used to locate their optimal solutions. Although this technique can obtain the optimal beamforming, it introduces a large number of additional variables. Therefore, the computational complexity of the SDR method is prohibitively high when the number of antennas is high. In this… CONTINUE READING