HSDPA异构网中基于速率调整的干扰消除算法  

An Interference Cancellation Algorithm Based on Rate Adjustment for HSDPA HetNet

作　　者：谢聪[1] 邱玲[1] 

机构地区：[1]中国科学技术大学,安徽合肥230027

出　　处：《无线电工程》2015年第9期1-4,共4页Radio Engineering

基　　金：中国科大-华为合作基金资助项目(YB2013120009)

摘　　要：异构网中扩展区域用户采用串行干扰消除(Successive Interference Cancellation,SIC)接收机对抗受到的严重共信道小区间干扰。当SIC接收机干扰消除不完全时,过大的残留干扰会使得接收机性能严重退化。针对高速下行分组接入(HSDPA)系统一般不采用功率控制机制的特点,通过分析SIC接收机残留干扰的特性,优化宏基站的数据速率,提出了基于速率调整的干扰消除算法,并给出了具体的算法流程。仿真结果表明,该算法在不同归属偏置值下,在保证用户总吞吐率不下降的同时提高扩展区域用户的性能。Users in range expansion region of Pico base stations （PBS） are equipped with SIC receivers to resist severe co-chan- nel intercell interference from neighbor Macro base stations （MBS）. However, the residual error of imperfect interference cancellation may be such severe that SIC receivers suffer from degraded performance.In view of High Speed Downlink Packet Access （HSDPA） sys- tem without power control, this paper analyses the residual error of SIC receivers and proposes an interference cancellation algorithm based on rate adjustment （RA） of MBSs.A system simulation demonstrates that the proposed scheme can improve the performance of users in range expansion region without sacrifice of average user throughput.

关 键 词：异构网 小区间干扰 串行干扰消除 速率调整 扩展区域用户 

分 类 号：TN92[电子电信—通信与信息系统]