一种多用户MIMO-OFDM系统的CQI有限反馈和量化方案  

A CQI limited feedback and quantization scheme for multiuser MIMO-OFDM system

作　　者：曹欢[1] 张静[1] 董建萍[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2012年第3期258-262,共5页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海师范大学校级项目(SK201129)

摘　　要：利用多用户场景下多输入多输出正交频分复用(MIMO-OFDM)系统用户端的信道质量反馈信息和服务质量的相互关系,给出一种以系统吞吐量最大化为指标得到最优量化比特的方案,同时给出了用户误码率限制下的最优量化门限值.它通过推导反馈信道质量信息数与用户传输速率、中断概率之间的数学关系,在用户误码率要求下,设置最优量化门限使系统吞吐量最大化.仿真结果表明:该方案不仅能够满足系统的传输速率和平均误码率要求,还降低了反馈开销.By utilizing the interrelation between channel feedback information of subscriber and quality of service in the scenario of multi-user multiple input multiple output orthogonal frequency division multiplexing （ MIMO- OFDM）, a scheme that calculates the optimal quantization thresholds is proposed in order to achieve high total transmission rate which is subject to constraints of users＇ bit error rate. It discusses the mathematic relationship among feedback channel information, user transmission rate and outage probability by setting optimal quantization thresholds to maximize system throughput. Simulation results show that the scheme can not only satisfy system transmission rate and average bit error rate requirement, but also reduce the system feedback cost.

关 键 词：多输入多输出 正交频分复用 有限反馈 量化门限 

分 类 号：TN929.5[电子电信—通信与信息系统]