计算机工程2017，Vol.43Issue(11)：66-69,75,5.DOI:10.3969/j.issn.1000-3428.2017.11.011
一种改进的无数据辅助频偏估计算法
An Improved Non-Data-Aided Frequency Shift Estimation Algorithm
安琦 1何子述 1李会勇1
作者信息
- 1. 电子科技大学电子工程学院,成都611731
- 折叠
摘要
Abstract
In order to solve the problem of imbalance between the estimation accuracy and estimation range of the intercepted signal with low Signal-to-Noise Ratio (SNR) in electronic environment,such as radio monitoring and electronic warfare and other non-cooperation communications,this paper proposes an improved Non-Data-Aided (NDA) frequency shift estimation algorithm.The influence of the maximum correlation interval to estimation range is removed through the difference function of the self-correlation of Q times of the normalized baseband signal.Then an effective estimation value is accomplished by the weighted summation of the difference phase.Simulation results show that the proposed algorithm can obtain the estimation accuracy of almost 10-4 even if the SNR is low to-15 dB,which could meet the requirements of the actual monitoring.关键词
频偏估计/估计精度/最大相关间隙/加权平均/无数据辅助Key words
frequency shift estimation/estimation accuracy/maximum correlation interval/weighted average/Non-Data-Aided (NDA)分类
信息技术与安全科学引用本文复制引用
安琦,何子述,李会勇..一种改进的无数据辅助频偏估计算法[J].计算机工程,2017,43(11):66-69,75,5.
