摘要
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.
研究了在发送相关信道场景下,综合利用统计信道状态信息和瞬时信道状态信息的多波束选择算法.与传统的基于码本的传输方案不同,基于单信道质量标识反馈的多波束选择算法利用统计信道状态信息决定其最佳的波束矢量,每一时隙只反馈信道质量标识,而且该算法的性能与传统方案基本相近. 为了进一步提高平均和速率,提出了基于双信道质量标识反馈的多波束选择算法,该算法决定 2 个最佳统计特征方向,并且每时隙反馈双信道质量标识. 理论分析和仿真结果表明: 基于双信道质量标识反馈的多波束选择算法可以增加多用户分集和复用增益,具有更高的平均和速率.
基金
The National Natural Science Foundation of China( No. 60925004, 60902009, 61001103)
the National Science and Technology Major Project of China ( No. 2009ZX03003-005-02, 2009ZX03003-011-04,2011ZX03003-003-03)
the Natural Science Foundation of Jiangsu Province of China ( No. BK2011019)
the Natural Science Foundation of the Jiangsu Higher Education Institutions of China ( No. 10KJB510021)
