智能天线辅助的PN 码同步捕获新方法研究

为有效解决强干扰环境下长PN 码的同步捕获问题，研究了基于自适应滤波器的PN 码同步捕获方法，给出了基于自适应滤波器权矢量范数的同步捕获判决准则，与传统的基于均方误差的判决相比，这种方法可以大幅提高判决的正确概率。在此基础上，研究了智能天线权值与PN 码同步联合捕获算法，并对其性能进行了计算机仿真验证，结果表明这种空时联合的捕获算法可以有效实现低SINR 环境下的长PN 码捕获。

New PN Code Acquisition Scheme with Smart Antennas

In order to solve long PN code synchronization acquisition under strong jamming environment, PN code acquisition based on adaptive filter scheme is studied. A new synchronization acquisition decision rule base on adaptive filter weight vector norm is proposed. Compared with the traditional method, the new method provides a higher correct detection probability. Under the above method, a united acquisition algorithm combining smart antenna weight vector and the adaptive filter weight vector is studied, which performance is validated by computer simulation. The result shows that the kind ofspace-time united acquisition algorithm can effectively realize long PN code acquisition under very low SINR environment.