划分相位空间的PN码捕获性能分析  

Analysis on Acquisition Performance of PN Codes Based on Phase Subspace-division

作　　者：赵建功[1] 侯娟[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]石家庄职业技术学院,河北石家庄050081

出　　处：《无线电工程》2011年第11期25-27,55,共4页Radio Engineering

摘　　要：频率选择性衰落信道中,接收伪噪声(Pseudo-Noise,PN)码的不确定相位空间中存在多个同相单元。建立检测模型获得了检测过程的检测概率和虚警概率。通过状态转移图结合划分码相位子空间的方法对捕获状态的循环流转进行了描述,获得了捕获性能对信道特性的依赖关系。数值仿真给出了捕获性能随路径数量和接收信噪比等主要参数的变化趋势。There are multiple in-phase cells in the uncertainty region of the received PN（pseudo-noise） code in frequency-selective-fading channels.The detection probability and false-alarm probability are obtained via modeling of the detection process.The cyclic transition between the states emerging in the acquisition process is characterized by flow-graph approach with the uncertainty region of codes divided into multiple sub-regions.The dependence of some acquisition performance parameters on channel characteristics is obtained.The variance of acquisition performance with major channel parameters i.e.number of resolvable paths and SNR are analyzed according to the numerical results.

关 键 词：扩频 多径衰落信道 捕获 状态转移图 

分 类 号：TN911[电子电信—通信与信息系统]