电子学报Issue(1)：160-165,6.DOI:10.3969/j.issn.0372-2112.2015.01.025
单通道高阶调制线性混合信号的频偏估计
Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals
摘要
Abstract
For single-channel linear mixture of high-order modulated signals which have the fixed frame length and sync code ,a frequency offset estimation (FOE ) algorithmbased on the maximum likelihood criterion is proposed when the two signals are coded asynchronously ,and the effective range of FOE is given .FOE is calculated byoptimising the objective function ,which is ob-tained from cross-correlation computation ,and the optimised process is accomplished by utilising hierarchical search .To evaluate the performance of the proposed algorithm ,Cramer-Rao Bound (CRB)of mixed-signal FOE is derived .Simulation results show that ,the estimation performance of the algorithm can come close to CRB performance with low Eb/N0 .The proposed algorithm is also ap-plied to the FOE of a mixed signal whose power is asymmetrical .关键词
单通道混合信号/高阶调制/频偏估计/最大似然估计/克拉美罗界Key words
single-channel mixed signals/high-order modulation/frequency offset estimation/maximum likelihood estima-tion/Cramer-Rao Bound分类
信息技术与安全科学引用本文复制引用
杨勇,张冬玲,彭华,涂世龙..单通道高阶调制线性混合信号的频偏估计[J].电子学报,2015,(1):160-165,6.基金项目
国防基金（No ．9140C860103120C8601）；国家自然科学基金 （）
