采用线性迫零接收机的多天线多用户分集性能分析  

Performance Analysis of Multiuser Diversity for MIMO Systems with Linear Zero-Forcing Receiver

作　　者：曾二林[1] 朱世华[1] 廖学文[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《电子与信息学报》2007年第12期2938-2942,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60372055);博士点基金(20030698027)资助课题

摘　　要：采用线性迫零接收机的多天线系统中,同时传输的多个数据流,其信噪比并不相互独立,这使得分析多用户分集的性能非常困难。该文通过分布假设检验和最大似然参数估计方法,采用伽马分布逼近所有数据流信噪比最大、最小值以及均值的概率分布,并基于此进一步分析了多天线多用户分集的系统性能。仿真结果表明,前述逼近的准确度较高,该文的分析方法能够较好地衡量多用户分集增益的大小。In multiantenna systems exploiting linear zero-forcing receivers, the Signal-to-Noise Ratio （SNR） on each of the simultaneous sub-streams is not independent with each other. This makes the performance analysis of the multiuser diversity much more difficult. By means of hypothesis testing and the maximum likelihood parameter estimation, this paper uses the Gamma distribution to approximate the probability distribution of the maximum, the minimum and the mean value of the SNRs on all the streams. Based on this, the performance of multiuser diversity for multiantenna systems is analyzed. Simulation shows that the aforementioned approximation closely matches the real distribution and the analysis provides a good estimation on the multiuser diversity gain.

关 键 词：多天线 多用户分集 迫零接收机 性能分析 

分 类 号：TN929.5[电子电信—通信与信息系统]