摘要
提出了一种周期长码DSSS信号扩频序列盲估计改进方法。首先把周期长码DSSS信号建模为虚拟多用户分段系统,周期长码序列可转化为多个都含有模糊矩阵的短码结构;然后采用基于二阶统计量的思路,从矩阵中提取信息去除模糊的影响,并估计得到原始的扩频码序列。通过对该思路的进一步改进,成功应用到多径环境盲估计方法中;最后通过计算机仿真结果验证了该算法的有效性,其性能优于以前的方法。
This paper proposes a method of blind estimation for PLC（ Periodic Long Code）DSSS（ direct sequence spread spectrum）signal.Firstly,PLC DSSS signal is modeled as a virtual multi-user system,and PLC sequence can be converted to several short-code structures with ambiguity matrix.Then,based on the idea of SOS（ second-order statistics）,influence of ambiguity matrix is removed and the original spreading codes sequence also estimated.The modified algorithm is successfully applied to blind estimation in multipath environment.Finally,computer simulation verifies the efficiency of this modified algorithm and indicates that its performance is better than that of original one.
出处
《通信技术》
2015年第3期272-277,共6页
Communications Technology
