Limited feedback SDMA schemes based on statistical CSI

作者：Sun Qiang; Zhang Yuan; Jin Shi; Gao Xiqi^*

来源：Journal of Southeast University (english Edition), 2012, 28(1): 1-7.

DOI：10.3969/j.issn.1003-7985.2012.01.001

• Analysis and simulation
• Conventional schemes
• Instantaneous channel state informations
• Limited feedback
• Multi-beam
• Multiplexing gains
• Multiuser diversity
• Multiuser multiple input multiple output (MIMO)
• Selection algorithm
• Single channels
• Spatial division multiple access
• Statistical channel state informations
• Sum-rate
• Time slots
• Transmission schemes
• Transmit correlation

This paper investigates the multi-beam selection algorithms for transmit correlation channels by using statistical channel state information (SCSI) and instantaneous channel state information. Unlike the conventional codebook-based transmission scheme, the proposed multi-beam selection with the single channel quality indicator (CQI) feedback (MBS-SCF) algorithm determines the preferred beam vector by exploiting the SCSI and only feeds back CQI at each timeslot. The performance of the MBS-SCF algorithm is nearly the same as that of the conventional scheme. In order to further improve the average sum rate, a novel multi-beam selection with the dual CQIs feedback (MBS-DCF) algorithm is proposed, which determines dual preferred statistical eigen-directions and feeds back dual CQIs at each timeslot. The theoretical analysis and simulation results demonstrate that the MBS-DCF algorithm can increase the multiuser diversity and multiplexing gain and exhibits a higher average sum rate.

• 出版日期2012
• 单位东南大学