摘要
利用循环谱理论对BPSK直接序列扩频信号进行参数估计,分析了其循环谱包络特征;在有限数据下,为实现更低信噪比情况下的直扩信号参数估计,提出了1种改进算法,该算法基于数据分段处理和重叠保留,通过在非零循环频率上的2次一维搜索实现参数估计,能够有效地抑制噪声的影响,避免多维搜索,计算量小;还分析了算法性能,给出了算法实现的具体步骤,并进行了计算机仿真。仿真结果证明了所提出算法的有效性。
The cyclic spectrum theory is applied to estimate parameters of BPSK DS-SS signal,and the cyclic spectrum amplitude of the signal is analyzed.An innovatory estimation algorithm is proposed to realize parameters estimation of DS-SS signal in limited data length.The algorithm based on data division and overlap reservation can restrain noise effectively.The estimation is realized by searching in non-zero cyclic frequencies twice,which can reduce the computing time and avoid multi-dimentional search.The performance of the algorithm is analyzed,the procedure is given and the computer simulation test is offered.The simulation results have proved that the validity of the method.
出处
《电子测量技术》
2011年第9期30-34,共5页
Electronic Measurement Technology
基金
国家自然科学基金(60232010)
关键词
BPSK直扩信号
循环谱
参数估计
改进算法
BPSK DS-SS signal
cyclic spectrum
parameter estimation
innovatory algorithm