被动定位中WCDMA多小区检测仿真分析  

Analysis and Simulation of WCDMA Multi-Cell Detection in Passive Positioning

作　　者：杨振[1] 周世东[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《计算机仿真》2015年第2期200-204,214,共6页Computer Simulation

基　　金：国家科技重大专项(2013ZX03001024-004)

摘　　要：在多小区网络信号定位优化的研究中,解决WCDMA被动定位中检测小区数目不足的问题。由于多小区中远处小区信号衰减大,且受近处小区信号的同频干扰影响,不能被正确解调,从而限制了检测小区总数的难点,提出将多天线联合检测和相应的串行干扰消除(SIC)相结合的解决方案。利用WCDMA下行信号特征,设计适用于WCDMA系统的SIC算法,以消除近处小区的同频干扰,并通过多天线联合检测,以抵抗远处小区的信号衰减,并抑制消除误差的影响。通过建立系统模型和仿真平台,将上述方案与传统方案进行对比分析,结果表明,所提方案有效地提高了被动定位中检测小区的总数,验证了所提方案的有效性。To impove the number of cells deteced in the passive positioning of WCDMA, considering the difficulty that the signal of far cells of multi - cell has large attenuation and is interfered by the co - channel interference of near cells, so can not be demodulated correctly, which limits the number of cells detected, a method combining Multi - antenna joint detection and Successive Interference Cancellation （ SIC ） was proposed. According to the WCDMA downlink signal characteristics, a SIC algorithm was designed based on WCDMA system to chminate the co - channel interference of near cells and combined with the algorithm of Multi - antenna joint detection to inhibite influence of cancellation noise. By building system model and simulation platform, the method was compared with the traditional method, and the results show that the proposed method can effectively improve the number of ceils deteced in passive positioning.

关 键 词：多小区检测 同频干扰 串行干扰消除 多天线联合检测 

分 类 号：TN802[电子电信—信息与通信工程]