极大载波多普勒频偏估计算法  

Algorithm of Estimation for Very Large Doppler Frequency Offset

作　　者：秦勇[1] 崔艳[2] QIN Yong;CUI Yah(Team 70, unit 92497 of CPLA, Hainan 572425, China;Institute of Statistics , Xi hn University of Finance and Economics, Xihn 710000, China)

机构地区：[1]中国人民解放军92497部队70分队 [2]西安财经学院统计学院

出　　处：《无线通信技术》2017年第4期38-41,46,共5页Wireless Communication Technology

摘　　要：本文对极大多普勒频偏条件下的载波频偏捕获进行了研究,提出了扫频与平方法作FFT相结合的载波频偏估计算法。首先,针对低地球轨道(LEO)卫星或高速载体运动造成的极大多普勒频偏,建立了接收信号的仿真模型;其次,设计了载波频偏捕获方案,并给出了算法工作流程;最后对算法的关键参数进行了MATLAB仿真。此算法便于硬件实现。Carrier frequency offsetNew algorithm is provided.Squareacquisition is researched for very large Doppler frequency offset.method with FFT is combined with searching for frequency offset.Firstly, Simulation model of received signal is established for very large carrier frequency offset crea-ted by LEO satellite or high speed object; Secondly, the programme for carrier frequency offset ac-quisition is designed, and the algorithm processing is introduced. At last, MATLAB simulation isdone for key parameter. For the algorithm, hardware implementation is convenient.

关 键 词：多普勒频偏 卫星通信 载波频偏捕获 

分 类 号：TN97[电子电信—信号与信息处理]