突发信号载波频偏估计的广义延拓逼近算法  

Generalized extended approximation algorithm for carrier estimation of burst signal

作　　者：张志富[1,2] 裴军[1] 胡超[1] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国科学院大学,北京100049

出　　处：《系统工程与电子技术》2017年第6期1215-1220,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(11573041);国家重点研发计划(2016YFB0501900)资助课题

摘　　要：为了解决在突发信号载波频偏估计问题中,载波频偏估计算法对估计精度、信噪比门限和估计范围的兼顾问题,提出了基于广义延拓逼近的载波频偏估计算法。该算法无需数据辅助,对接收信号频域信息做合理单元划分,节点处满足插值条件,单元域内实现最佳拟合,能够有效提升整域内的逼近精度。仿真结果表明,与文献算法相比,该算法具有更低的信噪比门限、更高的估计精度和理论最佳的估计范围。算法数学模型稳健、复杂度低,具有很好的可实现性和很高的使用价值。A carrier frequency offset estimation algorithm based on generalized extended approximation is proposed to solve the problem of the estimation accuracy, the signal-to-noise ratio （SNR） threshold and the estimation range of the carrier frequency offset estimation algorithm. The algorithm does not need data support. It makes a reasonable division of the received signals in the frequency domain, and satisfies the interpolation condition at the node. The algorithm can achieve the best fitting in the unit field, and can effectively improve the accuracy of approximation in the whole domain. Simulation results show that the proposed algorithm has a lower SNR threshold, higher estimation accuracy and optimal estimation range compared with other algorithms. The mathematical model of the algorithm is robust and low complexity, and it has very good performance and high use value.

关 键 词：突发信号 载波频偏估计 低信噪比 广义延拓逼近 

分 类 号：TN911[电子电信—通信与信息系统]