Research on Multipath Delay Estimation in Wireless Channels

ZHAO Dong-sheng; DUAN Hong-guang; ZHANG Xiang-bin; LIU Cheng

doi:10.13756/j.gtxyj.2019.01.009

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Research on Multipath Delay Estimation in Wireless Channels

- Research on Multipath Delay Estimation in Wireless Channels
- Study on Optical communication Issue 1, Pages: 53-58(2019)
- 作者机构：
  
  重庆邮电大学通信与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2019.01.009
  CLC： TN911.23
- Published：2019，
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[1]赵栋生,段红光,张祥斌,刘成.无线信道多径时延估计的方法研究[J].光通信研究,2019(01):53-58.

ZHAO Dong-sheng, DUAN Hong-guang, ZHANG Xiang-bin, et al. Research on Multipath Delay Estimation in Wireless Channels. [J]. (1):53-58(2019)
[1]赵栋生,段红光,张祥斌,刘成.无线信道多径时延估计的方法研究[J].光通信研究,2019(01):53-58. DOI： 10.13756/j.gtxyj.2019.01.009.

ZHAO Dong-sheng, DUAN Hong-guang, ZHANG Xiang-bin, et al. Research on Multipath Delay Estimation in Wireless Channels. [J]. (1):53-58(2019) DOI： 10.13756/j.gtxyj.2019.01.009.

摘要

为提高多径条件下无线信道测量中的时延估计精度

结合匹配滤波、方位估计方法（MODE）以及基于加权傅里叶变换和松弛（WRELAX）算法

提出了一种具有额外根的方位估计与基于加权傅里叶变换和松弛法算法的融合（MODEX-WRELAX）算法

并给出了相应的算法推导。新算法既可以分辨多径时延

又能很好地抑制噪声以及强干扰。对新算法进行仿真实验

仿真结果表明

新算法提供了比MODE、WRELAX以及MODE-WRELAX算法更高的精度和分辨率

且新算法可以接近相应的克拉美罗界限（CRB）。

Abstract

In order to improve the accuracy of time delay estimation in wireless channel measurements under multipath conditions

a combination of matched filtering

Method of Direction Estimation（MODE）

and Weighted Fourier transform and RELAXation based（WRELAX）are studied.This paper proposes a MODE with extra Roots

which is based on WRELAX（MODEX-WRELAX）algorithm.The corresponding algorithm derivation is also presented in this paper.The new algorithm can not only resolve multipath delay but also suppress noise and strong interference well.Simulation results show that this method provides higher accuracy and resolution than MODE

WRELAX

and MODE-WRELAX algorithms.It also shows that the MODEX-WRELAX algorithm can approach the corresponding Cramer-Rao Bound（CRB）.

关键词

多径信道时延估计基于加权傅里叶变换和松弛算法

Keywords

multipath channeldelay estimationWRELAX algorithm

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