联合部分干扰抵消的TD集群多小区联合检测  

Combination of Partial Interference Cancellation and Joint Detection in TD Trunking Downlink

作　　者：成聿伦[1,2] 杨龙祥[1,2] 

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,南京210003 [2]南京邮电大学宽带无线通信与传感网技术教育部重点实验室,南京210003

出　　处：《数据采集与处理》2012年第5期541-546,共6页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(61071090;61171093)资助项目;江苏省高校自然基金重大项目(11KJA510001)资助项目;江苏省高校研究生科研创新计划(CXZZ11-0388;CXLX11-0404)资助项目;国家科技重大专项课题(2011ZX03005-004-003)资助项目;江苏省"九七三"计划(BK2011027)资助项目

摘　　要：针对TD集群下行智能天线无法使用,链路小区间干扰严重的问题,提出了将判决反馈与单小区联合检测通过部分干扰抵消进行级联的方案消除干扰。通过重新排列总系统矩阵,消除了多反馈级数带来的错误积累,提高了反馈精度,其单小区JD部分避免了扩展矩阵维数,从而减弱了算法对背景噪声的放大效应。比较了其与传统算法的抗小区间干扰能力以及算法复杂度,仿真结果验证了该方案的有效性及在各种信道下的鲁棒性。Smart antenna cannot be applied in TD trunking downlink and its capacity is limited due to the inter-cell interference（ICI）.So a combination of single-cell joint detection（JD） and decision feedback interference cancellation is proposed through partial successive interference cancellation to eliminate interference.By rearranging the total system matrix,the accuracy of feedback is insured while the single-cell JD part avoids the expansion of the system matrix dimension,thus weakening the amplification of background noise.The scheme and conventional ICI suppression algorithms are analyzed and compared in anti-interference ability and complexity.Simulation results verify the effectiveness and robustness of the proposed scheme under a variety of multipath channels.

关 键 词：集群系统 小区间干扰 联合检测 干扰抵消 

分 类 号：TN929.52[电子电信—通信与信息系统]