2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform

YANG Xiao-ming; TAO Ran

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2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform

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- 2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform
- Acta Electronica Sinica Vol. 36, Issue 9, Pages: 1737-1740(2008)
- 作者机构：
  
  北京理工大学电子工程系,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.7
- Published Online：25 September 2008，
  
  Published：2008
- 稿件说明：
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YANG Xiao-ming, TAO Ran. 2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform[J]. Acta Electronica Sinica, 2008, 36(9): 1737-1740.
DOI：

YANG Xiao-ming, TAO Ran. 2-D DOA Estimation of LFM Signals Based on Fractional Fourier Transform[J]. Acta Electronica Sinica, 2008, 36(9): 1737-1740. DOI：

摘要

本文提出了一种基于分数阶傅里叶变换(Fractional Fourier Transform

FRFT)的多线性调频(Linear Frequency Modulation

LFM)信号二维波达方向(Direction of Arrival

DOA)估计方法.该方法利用FRFT对LFM信号的能量聚集特性

构造出一种新的分数阶傅里叶域的阵列信号数据模型

并利用MUSIC算法实现对多个LFM信号的二维DOA估计.仿真实验验证了算法的有效性.

Abstract

A new method to estimate 2-D DOA of multiple LFM signals is proposed.Based on a fact that the LFM signal has the energy-concentrated performance in the fractional Fourier transform domain (FRFD)

a novel array data model in FRFD is constructed

MUSIC algorithm is then applied on correlation matrix in FRFD to obtain the 2-D DOA estimation of multiple LFM sources.The simulation results verified the efficiency of the new method.

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