Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals

YANG Yong; ZHANG Dong-ling; PENG Hua; TU Shi-long

doi:10.3969/j.issn.0372-2112.2015.01.025

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Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals

更新时间：2025-07-16

- Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals
- Acta Electronica Sinica Vol. 43, Issue 1, Pages: 160-165(2015)
- 作者机构：
  
  1. 解放军信息工程大学信息系统工程学院,河南,郑州,450002
  2. 信号盲处理国家重点实验室,四川,成都,610041
  3. 解放军信息工程大学信息系统工程学院,河南,郑州,450002
  4. 信号盲处理国家重点实验室,四川,成都,610041
- 作者简介：
- 基金信息：
  
  National Defense Foundation of China (No.9140C860103120C8601);National Natural Science Foundation of China (No.61401511)
- DOI：10.3969/j.issn.0372-2112.2015.01.025
  CLC： TN911.7
- Published：2015
- 稿件说明：
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YANG Yong, ZHANG Dong-ling, PENG Hua, et al. Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals[J]. Acta Electronica Sinica, 2015, 43(1): 160-165.
DOI：

YANG Yong, ZHANG Dong-ling, PENG Hua, et al. Frequency Offset Estimation in Single-Channel Linear Mixture of High-Order Modulated Signals[J]. Acta Electronica Sinica, 2015, 43(1): 160-165. DOI： 10.3969/j.issn.0372-2112.2015.01.025.

摘要

针对具有固定帧长和固定帧同步序列的单通道高阶调制线性混合信号

当两路信号编码异步时

在已知帧长的条件下提出一种基于最大似然准则的频偏估计算法

并给出了算法的有效频偏估计范围.算法通过求互相关获得目标函数

并利用分级搜索的方法估计频偏.为对算法的性能进行评价

文中同时推导了混合信号频偏估计的克拉美罗界(Cramer-Rao Bound

CRB).仿真结果表明

算法在低

下可获得接近CRB的估计性能.此外

算法还适用于功率非对称的混合信号.

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 obtained 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

.The proposed algorithm is also applied to the FOE of a mixed signal whose power is asymmetrical.

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