tdscdma中智能天线技术及相关问题研究.docx

中文摘要
。它通过下行波束赋形,使基站发射功率主要对准移动终端方向,有效地减少了各个移动用户之间的干扰,提高了系统的频谱利用率和基站覆盖范围。,对智能天线技术在第三代移动通信领域中的应用做了深入和系统地研究。文章首先介绍了智能天线的一般工作原理,说明了引入智能天线技术对移动通信系统性能的提高所带来的影响。,并在此基础上引入了 TD。SCDMA系统智能天线的一般结构和信号接收模型。,提出了最大信噪比准则波束赋形算法的具体实现方案,并在大量仿真结果的基础上对引入智能天线后的系统性能进行了分析和总结。最后,文章对波达角度估计和TD—SCDMA系统移动终端定位技术做了初步地探讨, 。关键词:;智能天线;下行波束赋形;DOA估计;系统定位
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ABSTRACT
Smart antenna is one of the key technologies that ale applied in TD—SCDMA beam—forming,the direction of base station(BS)signals can properly adjust according to user equipment(UE).So the interference of UE can decrease effectively and the efficiency of frequency and the covering area of BS ale the basis of studying physical layer (PHY)standard in ,the use of smart antenna in the 3rd global system for munications is studied systemically and profoundly in this ,the principles of smart antenna ale introduced;the advantages of smart antenna for munications ale the standard of physical layer and me frame structure in 1D-SCDMA is configuration of smart antenna and the model of received signals in
are algorithms for are alSO studied systemically in the paper,the realizing method of arithmetic of maximal SNR rule is advanced,the capability of
system of various algorithms ale the basis of lors of simulations. these algorithms ale summarized and ,the -arrival algorithms and
UE position loeation ale discussed further reveal advantages of the smart antenna technology and system.
Key words:TD—SCDMA;smart antenna;beam—forming;DOA consideration;position location
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