基于扩频序列自相关性的导航接收机干扰抑制  

A novel interference suppression algorithm for GNSS receiver based on the coherence of spreading codes

作　　者：相飞[1] 廖桂生[1] 曾操[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《电波科学学报》2013年第5期821-828,共8页Chinese Journal of Radio Science

基　　金：长江学者和创新团队发展计划(IRT0954);国家自然科学基金(61231017;61101243)

摘　　要：提出了一种抑制信号干扰的波束形成算法.利用GNSS信号中扩频序列的强自相关性在信号捕获后,采用GNSS信号多个周期的相关峰值估计相关值中的信号协方差矩阵,使用相关前、后的协方差矩阵在最大化输出信噪比准则下得到最优权.所提算法处理时无需GNSS信号和干扰方向的先验知识.仿真与实测结果表明:与功率倒置方法和Spectral Self-Coherence Restoral(SCORE)算法相比,经所提算法处理后的GNSS信号信干噪比获得明显提高.A novel interference suppression algorithm for Global Navigation Sattel- lite System（GNSS） signal is proposed in this paper. The spreading codes in GNSS signal exhibit strong self-coherence and the correlation matrix of the GNSS signal can be estimated using several peaks of correlation values of received signal and ref- erence signal. The optimum weight is obtained under the maximum Signal to inter- ference plus noise ratio （SINR） criterion using the covariance matrix of pre- correlation and post-correlation signal. No priori knowledge of the directions of GNSS signals is needed for the algorithm. Simulations and experiments demonstrate that, compared with the power inversion method and spectral self-coherent restoral SCORE algorithm, the proposed algorithm can provide a similar performance of inference suppression, but the output SINR is significantly increased.

关 键 词：全球卫星导航 自适应阵列处理 干扰抑制 波束形成 

分 类 号：TN911.7[电子电信—通信与信息系统]