Joint DoA Estimation Method based on FFT and Sparse Reconstruction

ZHAO Ji-hong; ZHANG Pei-jie; QU Hua; WANG Wei-hua; ZHANG Wen

doi:10.13756/j.gtxyj.2019.04.010

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Joint DoA Estimation Method based on FFT and Sparse Reconstruction

- Joint DoA Estimation Method based on FFT and Sparse Reconstruction
- Study on Optical communication Issue 4, Pages: 50-54(2019)
- 作者机构：
  
  1. 西安邮电大学通信与信息工程学院
  2. 西安交通大学电子信息学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2019.04.010
  CLC： TN911.7
- Published：2019，
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[1]赵季红,张佩杰,曲桦,王伟华,张雯.基于FFT与稀疏重构的联合DoA估计方法[J].光通信研究,2019(04):50-54.

ZHAO Ji-hong, ZHANG Pei-jie, QU Hua, et al. Joint DoA Estimation Method based on FFT and Sparse Reconstruction. [J]. (4):50-54(2019)
[1]赵季红,张佩杰,曲桦,王伟华,张雯.基于FFT与稀疏重构的联合DoA估计方法[J].光通信研究,2019(04):50-54. DOI： 10.13756/j.gtxyj.2019.04.010.

ZHAO Ji-hong, ZHANG Pei-jie, QU Hua, et al. Joint DoA Estimation Method based on FFT and Sparse Reconstruction. [J]. (4):50-54(2019) DOI： 10.13756/j.gtxyj.2019.04.010.

摘要

针对稀疏重构波达方向（DoA）估计方法的角度搜索范围较大导致算法复杂度较高的问题

文章提出一种基于快速傅里叶变换与稀疏重构相结合的DoA估计方法。该方法首先解决了基于经典傅里叶变换的DoA估计方法只能估计出一半角度范围内来波方向的问题

改进后的方法能够估计出整个角度范围内来波方向粗略范围;然后在粗略估计角度的范围内利用稀疏重构的方法进行超分辨力角度估计

极大减少了角度搜索的范围、降低了计算复杂度。仿真结果表明

所提方法不仅能降低计算复杂度

而且在低信噪比和低快拍时角度误差较小。

Abstract

The computational complexity of the sparse reconstruction based on Direction of Arrival（DoA） increases with the search range of angle dramatically. To address this issue

this paper proposes a joint DoA estimation method based on Fast Fourier Transform（FFT） and sparse reconstruction.Firstly

the method solves the problem that the DoA estimation method based on the classical Fourier transform that can only estimate the direction of the incoming wave within half of the angular range.Then

the improved method can estimate the rough range of the incoming wave direction over the entire range of angles which can be used to roughly estimate the angle.Moreover

the sparse reconstruction method is used to perform super-resolution angle estimation in the range

which greatly reduces the range of angle search and reduces the computational complexity.Simulation results show that the proposed method can not only reduce the computational complexity

but also has less angular error at low signal-to-noise ratio and few snapshot.

关键词

波达方向估计快速傅里叶变换稀疏重构

Keywords

DoA estimationFFTsparse reconstruction

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