计算机应用研究2017，Vol.34Issue(1)：160-162,3.DOI:10.3969/j.issn.1001-3695.2017.01.034
新的O FD M系统载波频偏盲估计算法
New kind of carrier frequency offset estimation algorithm for OFDM systems
摘要
Abstract
In view of high complexity of the existing frequency offset estimation algorithms,this paper propsed a new blind es-timation algorithm based on constant modulus signal.It was assumed that the channels changed slowly,the adjacent OFDM symbols would generate the same channel responses,by measuring the amplitude difference between them,it derived a kind of objective function.By using the curve fitting method,it obtained the minimum value of the objective function at this point,the value of CFO estimation was closest to the true value.Simulation results show that the proposed algorithm is better than the exi-sting PDE-F[1]algorithm and PDE-T[2]algorithm,improving estimation accuracy,reducing the complexity.The algorithm has better applicability and stability under the conditions of constantly changing variations of narrow band noise and received signal gain.关键词
盲估计/载波频率偏差/恒模信号/窄带信号噪声比/正交频分复用Key words
blind estimation/carrier frequency offset/constant modulus signal/narrow band signal noise ratio/OFDM分类
信息技术与安全科学引用本文复制引用
余侃民,黄洋,杨霄鹏,刘鸣真..新的O FD M系统载波频偏盲估计算法[J].计算机应用研究,2017,34(1):160-162,3.基金项目
国家自然科学基金资助项目（61202490）；航空科学基金资助项目 （）
