PCMA系统中干扰信号的频偏与时延联合估计

魏雪娟; 杨勇; 郭一鸣; 张冬玲

doi:10.11959/j.issn.1000-436x.2017040

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PCMA系统中干扰信号的频偏与时延联合估计

学术通信 | 更新时间：2024-06-05

- PCMA系统中干扰信号的频偏与时延联合估计
- Joint estimation of interference frequency offset and time delay in PCMA system
- 通信学报 2017年38卷第2期页码：173-182
- 作者机构：
  
  解放军信息工程大学信息系统工程学院，河南郑州 450001
- 作者简介：
  
  [ "魏雪娟（1988-），女，河南兰考人，解放军信息工程大学硕士生，主要研究方向为通信信号处理。" ]
  [ "杨勇（1988-），男，云南大理人，解放军信息工程大学博士生，主要研究方向为盲信号处理、信道编译码技术等。" ]
  [ "郭一鸣（1990-），男，河北邢台人，解放军信息工程大学博士生，主要研究方向为通信信号处理、信号逆向分析。" ]
  [ "张冬玲（1976-），女，江苏盐城人，博士，解放军信息工程大学副教授，主要研究方向为盲信号处理、信道编译码技术等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61401511)
- DOI：10.11959/j.issn.1000-436x.2017040
  中图分类号： TN911.7
- 网络出版日期：2017-02，
  
  纸质出版日期：2017-02-25
- 稿件说明：
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魏雪娟, 杨勇, 郭一鸣, 等. PCMA系统中干扰信号的频偏与时延联合估计[J]. 通信学报, 2017,38(2):173-182.

Xue-juan WEI, Yong YANG, Yi-ming GUO, et al. Joint estimation of interference frequency offset and time delay in PCMA system[J]. Journal on communications, 2017, 38(2): 173-182.
魏雪娟, 杨勇, 郭一鸣, 等. PCMA系统中干扰信号的频偏与时延联合估计[J]. 通信学报, 2017,38(2):173-182. DOI： 10.11959/j.issn.1000-436x.2017040.

Xue-juan WEI, Yong YANG, Yi-ming GUO, et al. Joint estimation of interference frequency offset and time delay in PCMA system[J]. Journal on communications, 2017, 38(2): 173-182. DOI： 10.11959/j.issn.1000-436x.2017040.

摘要

针对合作接收的高阶调制成对载波多址（PCMA

paired carrier multiple access）信号，提出一种频偏与时延联合估计的算法。算法利用本地存储的序列样本作为辅助数据，与混合信号求相关得到目标函数，采用二维搜索的方法估计频偏和时延。通过设置联合估计的门限值，大大降低算法的计算量。推导干扰信号频偏与时延估计的修正的克拉美罗界（MCRB

modified Cramer-Rao bound），为算法性能评价提供理论依据。仿真结果表明，8PSK调制方式下频偏估计算法与已有算法性能相当，但复杂度降低了

。

Abstract

For cooperative received high-order modulation PCMA (paired carrier multiple access) signals

joint estima-tion of frequency offset and time delay was proposed.The sequence samples stored locally were used as auxiliary data.Estimation of frequency offset and time delay was calculated by optimizing the objective function

which was obtained from the cross-correlation computation of the auxiliary data and mixed signal

and the optimized process was accom-plished by utilizing two-dimensional search.By setting the threshold of joint estimation

the calculated amount was greatly reduced.Modified Cramer-Rao bound (MCRB) of interference frequency offset and time delay was derived

which provided theoretical basis for performance of the proposed algorithm.Simulation results show that the algorithm has similar performance with existing algorithms

but its complexity is reduced by two-thirds.

关键词

Keywords

references

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