|Table of Contents|

Two- dimensional DOA Estimation for Coherent Noncircular Sources(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2013年05期
Page:
82-86
Research Field:
测控技术与通信工程
Publishing date:

Info

Title:
Two- dimensional DOA Estimation for Coherent Noncircular Sources
Author(s):
ZHAO Da- yong1 ZHAO Zhen- yu2 AN Chun- lian3
 1. Communication Navigation and Command Automation Institution Equipment Academy of Air Force,Beijing 100085,China;
2. Teacher Education College,Harbin Normal University,Harbin 150001,China;3. School of Information and Communication Engineering,Harbin Engineering University,Harbin,PRC,150001
Keywords:
noncircular sources coherent sources two dimensional direction of arrival estimation ESPRIT
algorithm
L- shape array
PACS:
TN911. 7
DOI:
-
Abstract:
Abstract: The common two- dimensional DOA estimation algorithms are mostly based on circular signals,and
require a large number of slap shot and array elements,and the performance of estimation at low SNR is poor. By
utilizing the characteristics of the noncircular sources and the structure of the L- shape array,a 2- D DOA estimation
method for coherent noncircular sources is proposed. Firstly,both the array received signal data and its conjugate
signal data are exploited to form a reconstructed received covariance matrix,so that the array aperture is enlarged.
Then,a modified space smoothing method is proposed to de- correlate the coherent data,and the ESPRIT algorithm
is adopted to estimate the DOAs. The proposed method is effective at small array element number and low slap
number,in which the common ESPRIT algorithms fail to estimate. Moreover,it can improve the estimation per-
formance at low SNR as well. Simulation results show that the proposed algorithm can estimate coherent sources ef-
fectively and has much better performance than that of common ESPRIT algorithms.

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Last Update: 2013-12-26