空时处理引起的GNSS信号失真分析与补偿方法  

Analysis and Compensation Method of GNSS Signal Distortion Caused by Airtime Processing

作　　者：常嵩雨 贾学东[1] 陈国军[1] CHANG Songyu;JIA Xuedong;CHEN Guojun(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2024年第4期391-396,共6页Journal of Information Engineering University

摘　　要：在复杂的干扰环境中,空时自适应处理(STAP)技术会扭曲全球卫星导航系统(GNSS)信号的相关峰、降低捕获和跟踪性能,导致接收机的定位精度下降。首先,通过理论和仿真分析STAP在最小方差无失真响应准则下的相关峰失真,结果表明抽头数和空间相关系数会直接影响到相关峰的畸变;其次,为优化抽头数和降低空间相关系数,提出基于天线阵列信干噪比(SINR)的自适应抽头算法和阵列稀疏配置算法;最后,通过仿真验证优化后的抽头数和阵列稀疏配置可以减少因STAP引起的相关峰畸变。The space time adaptive processors(STAP)technology will distort the relevant peaks of global navigation satellite system(GNSS)signals and reduce the capture and tracking performance,which lead to the degradation of the positioning accuracy of the receiver in the complex interference environment.Firstly,the distortion of the correlation peak of STAP under the minimum variance distortion-free response criterion is analyzed using theory and simulation method,and the results show that the number of taps and spatial correlation coefficient directly affect the distortion of the correlation peak.Secondly,an adaptive tapping algorithm based on antenna array signal to interference plus noise ratio(SINR)and an array sparse configuration algorithm are proposed to optimize the number of taps and reduce the spatial correlation coefficient,respectively.Finally,the effectiveness of the two algorithms is verified through simulation,and the optimized number of taps and array sparse configuration can reduce the distortion of correlation peaks caused by STAP.

关 键 词：全球卫星导航系统 空时自适应处理 相关峰 阵列稀疏算法 自适应抽头算法 

分 类 号：TN97[电子电信—信号与信息处理]