一种应用于RAKE接收机的高效率多径搜索器的设计与实现  

Design and Implementation of an Efficient Multipath Searcher for RAKE Receiver

作　　者：王丽芳[1] 杨玉庆[1] 谈熙[1] 闵昊[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《复旦学报（自然科学版）》2010年第6期660-666,共7页Journal of Fudan University：Natural Science

基　　金：国家高技术研究发展计划(863计划)重点(SQ2008AA01ZX1480432)资助项目

摘　　要：提出了一种低复杂度、低硬件开销的多径搜索器结构.利用扰码匹配滤波器和峰值检测方法完成初步的多径搜索;引入一种假径搜索方法来代替非相干多帧平均的方法,提高了多径搜索的正确性,同时避免了采用大量存储单元.仿真结果表明:在给定的瑞利多径衰落信道条件和信号能量比条件下,该多径搜索器可以将搜索错误率保持在15%以下,较2帧的非相干多径搜索器,错误率减小5%,同时面积减少31.19%;较4帧的非相干多径搜索器,错误率减小1%,同时面积减少58.42%.A multipath searcher of low complexity and low hardware expense is presented.The primary multipath searching is accomplished by the scrambling code matched filter and the peak detector.A new false path searching method is proposed instead of the non-coherent averaging method.The new method reduces the memory expense while keeping a low false alarm probability.The result of simulation shows that for the given channel model and signal energy ratio,the false alarm probability of the proposed multipath searcher is less than15%,5% lower than that of the non-coherent averaging over two frames multipath searcher,and 1% lower than that of the non-coherent averaging over four frames multipath searcher.The size of the proposed multipath searcher is about 31.19% less than that of the non-coherent averaging over two frames multipath searcher,and 58.42% less than that of the non-coherent averaging over four frames multipath searcher.

关 键 词：RAKE接收机 多径搜索 宽带码分多址 

分 类 号：TN492[电子电信—微电子学与固体电子学]