分段极性相关法估计DS-BPSK信号参数  

Parameters Estimation of DS-BPSK Signals with Subsection Polar Correlation

作　　者：柏如龙[1] 张建立[1] 

机构地区：[1]中国电子科技集团公司第54研究所,河北石家庄050081

出　　处：《无线电工程》2006年第11期34-35,43,共3页Radio Engineering

摘　　要：介绍了一种分段极性相关的方法,并将其应用于DS-BPSK信号的多个参数估计和伪码捕获。该方法首先通过计算分段相关值的极性序列之间的相关值来估计基带码元极性,然后对分段数据进行平滑以提高信噪比条件,最后再估计伪码序列位数、码片宽度和伪码序列值等参数。仿真结果表明,该方法在输人信噪比R_(SN)=-17 dB条件下,可以同时估计DS-BPSK信号的多个特征参数,也可以进行伪码的快速捕获。A new method called subsection polar correlation is introduced and then is used in estimation of several DS-BPSK signal parameters and in PN acquisition. First, polar sequence correlation of subsection correlation value is calculated in order to estimate the baseband polar;Second, according to the estimated baseband polar, the subsection data is smoothed to improve the SNR ; Finally, the parameters of PN length, PN code width and PN sequence value can be estimated. The simulation of this method shows that under lowRSN conditions, it can simultaneously estimate several parameters, and also can implement fast PN acquisition.

关 键 词：分段极性相关 参数估计 伪码序列估计 伪码捕获 

分 类 号：TN911.72[电子电信—通信与信息系统]