用多波束天线的最优多用户检测器  

Combination of Multibeam Antenna Array and Optimum Multiuser Detector in Cellular CDMA Base Station

作　　者：王大庆[1] 张惠民[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程系

出　　处：《北京邮电大学学报》1998年第1期73-77,共5页Journal of Beijing University of Posts and Telecommunications

摘　　要：提出了用多波束天线阵对移动通信系统中小区用户分组，对各组用户采用最优多用户检测的新方法，以降低最优多用户检测器的计算复杂度，可以证明当小区内有Ｍ个用户、天线阵列产生Ｊ个波束时，多用户检测器的计算复杂度由原来的Ｏ（２Ｍ）降低到Ｏ（２Ｍ／Ｊ）．在低信噪比环境下，这种多用户检测器的性能接近理想的最优多用户检测器，优于传统的检测器．The multibeam antenna array and the optimum multiuser detector are combined to reduced the near far effects in asynchronous direct sequence spread spectrum multiaccess receiver. Based on this construction, the whole users in the cell can be divided into groups by the multibeam of the antenna array, and then the optimum multiuser detectors are applied to each group of users to obtain optimum reception. We compare this approach with the conventional detector and the optimum multiuser detector in bit error rate and computational complexity. Results show that when using the structure we proposed, the computational complexity can be substantially reduced, and the performance can be improved, therefore the new approach is more feasible to implement.

关 键 词：码分多址联接 多用户检测 天线阵列 

分 类 号：TN914.5[电子电信—通信与信息系统] TN820.15[电子电信—信息与通信工程]