利用改进卡尔曼滤波算法抑制GPS接收机相位噪声  

Phase-Noise Elimination of GPS Receiver Using Improved Kalman Filter

作　　者：王江安[1] 庄奕琪[1] 周清军[1] 李迪[1] 

机构地区：[1]西安电子科技大学微电子学院,西安710071

出　　处：《数据采集与处理》2010年第5期611-614,共4页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(60276028)资助项目;国家"八六三"高技术研究发展计划(2003AA1Z1410)资助项目

摘　　要：相位噪声是影响GPS接收机跟踪灵性能的主要因素之一。本文针对并行多通道GPS接收机,提出了一种相位噪声的抑制方法。由于多个通道的相位误差中均含有相位噪声,而其他噪声相互独立,因此可以通过改进卡尔曼滤波算法得到相位噪声的时域估计。通过相位补偿,有效地减小了每个通道的相位噪声,提高了接收机的抗干扰能力和跟踪灵敏度。最后本文给出了应用该算法的具体步骤,并通过仿真证明了该方法的有效性。The phase-noise is one of the reasons for decreasing the sensitivity of a GPS receiver.A phase-noise elimination method is proposed for GPS multi-channel receivers.Each channel contains the same phase-noises,and all the other noises in each channel are independent of each other.An improved Kalman algorithm is used to estimate the phase-noise.By the phase compensation,the phase-noise in the each channel is reduced,thus enhancing the sensitivity and the anti-jamming capability of a GPS receiver.The application of the algorithm is described.The simulation proves the effectiveness of the method.

关 键 词：GPS 相位噪声 相位估计 

分 类 号：TP914.53[自动化与计算机技术] TN911.72[电子电信—通信与信息系统]