高动态场景下卫星通信信号的载波跟踪算法  

Carrier tracking algorithm for satellite communication signals in high dynamic scenarios

作　　者：张庆业[1] 王力男[1] ZHANG Qingye;WANG Linan(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线互联科技》2024年第11期1-3,共3页Wireless Internet Technology

摘　　要：针对传统载波同步技术在低信噪比和大多普勒变化率条件下的载波跟踪失锁问题,文章提出一种高动态条件下载波跟踪算法,该算法对接收信号进行去调制后采用分段FFT算法估计多普勒频偏,把频率估计值作为测量值进行卡尔曼滤波完成噪声下的频率估计和跟踪。文章建立了仿真模型,对算法的跟踪性能及跟踪误差进行了仿真,仿真结果表明该算法能够在Es/N0=-1 dB的高动态条件下实现载波的估计和跟踪。A high dynamic condition carrier tracking algorithm is proposed to address the carrier tracking loss problem of traditional carrier synchronization technology under low signal-to-noise ratio and high Doppler rate conditions.This algorithm demodulates the received signal and uses a segmented FFT algorithm to estimate the Doppler frequency offset.The frequency estimation value is then used as a measurement for Kalman filtering to achieve frequency estimation and tracking in the presence of noise.A simulation model is established to simulate the tracking performance and tracking errors of the algorithm.Simulation results show that the algorithm can achieve carrier estimation and tracking under high dynamic conditions with Es/N0=-1 dB.

关 键 词：高动态 低信噪比 载波同步 卡尔曼滤波 

分 类 号：TN929.5[电子电信—通信与信息系统]