非合作情况下WCDMA系统期望小区信号分离与多径DOA估计  

Desired cell signal separation and multi-path DOA estimation forWCDMA system in the case of non-cooperation

作　　者：刘剑锋 戴旭初[1] 徐国微 郭晋宏 王光育 Liu Jianfeng;Dai Xuchu;Xu Guowei;Guo Jinhong;Wang Guangyu(University of Science and Technology of China,Hefei 230027,China;Unit 92773 of PLA,Wenzhou 325707,China)

机构地区：[1]中国科学技术大学,合肥230027 [2]92773部队,温州325707

出　　处：《电子测量与仪器学报》2018年第11期166-171,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：在非合作情况下,针对WCDMA系统下行多小区混合信号,提出了一种期望小区信号分离算法,该算法采用多天线接收方案,同时利用小区主扰码及导频信道扩频码特性对混合信号进行解扰解扩处理,综合利用多径信号的空间与时间的可分辨性来估计期望小区多径波束矢量来抑制干扰小区的多径分量,以实现多小区混合信号分离。仿真结果表明,该算法在低信噪比的情况能有效抑制干扰小区多径分量,同时能对期望小区多径DOA进行准确估计,信噪比在-15 dB时,DOA估计均方根误差可以达到0.1°。In the non-cooperation case, a novel algorithm is proposed for the downlink multi-cell mixed signal separation problem. The algorithm employs multi-antennas receiving scheme and despreads and descrambles the mixed signal using the cell primary scrambling code and the CPICH OVSF code. By using the spatial and temporal resolvability of the multipath signal, the desired cell multi-path beam were estimated which can be used to suppress the multipath components of the interference cell. The simulation results show that the proposed algorithms can effectively suppress the multi-path components of the interference cell, and accurately estimate the multipath DOA of the desired cell in the case of low SNR. When the SNR is-15 dB, the root mean square error(RMSE) of the DOA estimation can approach 0.1 degrees.

关 键 词：WCDMA系统 波束形成 信号分离 DOA估计 

分 类 号：TN929.533[电子电信—通信与信息系统]