MIMO广播系统中基于有限反馈的多用户选择新算法
doi: 10.3724/SP.J.1146.2009.01519
A New Multi-user Selection Algorithm in MIMO Broadcast System with Limited Feedback
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摘要: 在基于有限反馈多输入多输出(MIMO)广播系统的多用户选择研究中，目前已有的用户信噪干扰比(SINR)估计存在较大误差，这使得整个系统的性能受到制约。该文利用推导出的上下界来联合估计用户接收到的有用信号功率，得到了一种误差较小的SINR估计式，并基于该式给出了一种用户选择新算法。仿真结果表明，新的用户选择算法可以在低信噪比和高信噪比下同时达到较优性能，且复杂度较低。Abstract: In the research on multi-user selection of Multiple Input Multiple Output (MIMO) broadcast system with limited feedback errors in users SINR estimation in existing methods are big, which constrains the system capacity. In this paper by combining the deduced upper and lower bound to estimate the users received signal power, a novel users SINR estimation method with smaller error is derived and a new corresponding multi-user selection algorithm is proposed. Simulation results show that better performance and lower complexity can be achieved with the proposed algorithm both in low SNR and in high SNR.
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