Direction-of-Arrival Estimation Method of Coherent Signals Based on Data Matrix Reconstruction for Conjugate ESPRIT(C-SPRIT)

ZHU Sheng-qi; LIAO Gui-sheng; ZHOU Zheng-guang

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Direction-of-Arrival Estimation Method of Coherent Signals Based on Data Matrix Reconstruction for Conjugate ESPRIT(C-SPRIT)

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- Direction-of-Arrival Estimation Method of Coherent Signals Based on Data Matrix Reconstruction for Conjugate ESPRIT(C-SPRIT)
- Acta Electronica Sinica Vol. 37, Issue 12, Pages: 2838-2844(2009)
- 作者机构：
  
  西安电子科技大学雷达信号处理重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.7
- Published：2009
- 稿件说明：
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ZHU Sheng-qi, LIAO Gui-sheng, ZHOU Zheng-guang. Direction-of-Arrival Estimation Method of Coherent Signals Based on Data Matrix Reconstruction for Conjugate ESPRIT(C-SPRIT)[J]. Acta Electronica Sinica, 2009, 37(12): 2838-2844.
DOI：

ZHU Sheng-qi, LIAO Gui-sheng, ZHOU Zheng-guang. Direction-of-Arrival Estimation Method of Coherent Signals Based on Data Matrix Reconstruction for Conjugate ESPRIT(C-SPRIT)[J]. Acta Electronica Sinica, 2009, 37(12): 2838-2844. DOI：

摘要

本文提出了一种相干源波达方向估计算法.该方法利用C-SPRIT思想

通过构造数据矩阵

使得无论是否存在相干信号

均能很好估计信号波达方向(DOA).传统的空间平滑技术通过子阵平滑来解决相干源DOA估计问题

但信号之间并没有完全解相干

孔径损失也很大

且最多只能估计2

/3个相干源(

为阵元数目).本文方法也采用空间平滑去相干的思想

但无孔径损失

信号之间完全解相关

提高了相干源DOA估计精度

并且能估计

-1个相干源

该方法利用ESPRIT数值求解进行角度估计

无需角度搜索

运算量小

计算机仿真验证了该方法的有效性和优越性.

Abstract

A new algorithm has been presented to estimate the direction-of-arrival (DOA) in the presence of coherent signals.The conception of C-SPRIT has been used in our algorithm.By forming special data matrix

our algorithm performs well in estimation of DOA

no matter there are coherent signals or not.The DOA estimation of coherent signals has been mitigated by conventional spatial smoothing using the divided sub arrays.However

this result is obtained at the cost of losing effective spatial aperture

and the detectable number of coherent signals is 2

/3 at most (

is the number of array sensors).Compared with spatial smoothing method

our algorithm not only improves the estimation accuracy but also can detect

-1 coh

erent signals without aperture loss.The de-correlation of coherent signals is completely solved.The computational load is reduced by using the numerical algorithms of ESPRIT without spectral peak search.Computer simulation results are provided to verify the validity and superiority.

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