A Multiple Weighting Matrices Selection Scheme Based on Orthogonal Random Beamforming for MIMO Downlink System

In this paper, a multiple weighting matrices selection scheme based on orthogonal random beamforming is discussed to increase the throughput of the multi-user MIMO systems. Multiple weighting matrices are performed and computed during the mini-slots. And the base station selects the best matrix based on the partial channel state information and performs the orthogonal random beamforming during the time slot. The proposed scheme over multi-user random beamforming can increase the throughput of multi-user MIMO system significantly, and the simulation results show the validity.

[1]  Babak Hassibi,et al.  On the capacity of MIMO broadcast channels with partial side information , 2005, IEEE Transactions on Information Theory.

[2]  Shlomo Shamai,et al.  On the achievable throughput of a multiantenna Gaussian broadcast channel , 2003, IEEE Transactions on Information Theory.

[3]  D. Gesbert,et al.  Robust multi-user opportunistic beamforming for sparse networks , 2005, IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005..

[4]  Wei Yu,et al.  Sum capacity of Gaussian vector broadcast channels , 2004, IEEE Transactions on Information Theory.

[5]  Jeffrey G. Andrews,et al.  WLCp1-16: Capacity of Opportunistic Space Division Multiple Access with Beam Selection , 2006, IEEE Globecom 2006.

[6]  Thomas L. Marzetta,et al.  Multiple-antennas and isotropically random unitary inputs: The received signal density in closed form , 2002, IEEE Trans. Inf. Theory.

[7]  David Tse,et al.  Opportunistic beamforming using dumb antennas , 2002, IEEE Trans. Inf. Theory.

[8]  David Gesbert,et al.  Memory-based opportunistic multi-user beamforming , 2005, Proceedings. International Symposium on Information Theory, 2005. ISIT 2005..

[9]  Il-Min Kim,et al.  Opportunistic beamforming based on multiple weighting vectors , 2005, IEEE Transactions on Wireless Communications.

[10]  Yih-Fang Huang,et al.  An Opportunistic Downlink Mimo-Ofdm Scheme , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[11]  Shlomo Shamai,et al.  The capacity region of the Gaussian MIMO broadcast channel , 2004, International Symposium onInformation Theory, 2004. ISIT 2004. Proceedings..

[12]  Bartolomeu F. Uchôa Filho,et al.  Exploiting time coherence in opportunistic beamforming for slow fading channels , 2006, IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006..