DOA Estimation Algorithm Based on Adaptive Filtering in Spatial Domain

In this paper, a novel DOA estimation methodology based upon the technology of adaptive nulling antenna is proposed. Initially, the nulling antenna obtains the weight vector by LMS algorithm and power inversion criterion.Afterwards, reciprocal of the antenna pattern is defined as the spatial spectru...

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Bibliographic Details
Published in:China communications Vol. 13; no. 12; pp. 49 - 58
Main Authors: Zeng, Hao, Ahmad, Zeeshan, Zhou, Jianwen, Wang, Qiushi, Wang, Ya
Format: Journal Article
Language:English
Published: China Institute of Communications 01.12.2016
School of Communication Engineering, Chongqing University, Chongqing 400044 , China
Subjects:
adaptive filtering
Algorithm design and analysis
Antenna arrays
array signal processing
Covariance matrices
Direction-of-arrival estimation
DOA estimation
Estimation
Multiple signal classification
power inversion
Signal processing algorithms
DOA estimation
adaptive filtering
power inversion
array signal processing
ISSN:1673-5447
Online Access:Get full text
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Summary:In this paper, a novel DOA estimation methodology based upon the technology of adaptive nulling antenna is proposed. Initially, the nulling antenna obtains the weight vector by LMS algorithm and power inversion criterion.Afterwards, reciprocal of the antenna pattern is defined as the spatial spectrum and the extracted peak values are corresponded to the estimated DOA. Through observation of the spectrum and data analysis of variable steps and SNRs, the simulation results demonstrate that the proposed method can estimate DOA above board. Furthermore, the estimation error of the proposed technique is directly proportional to step size and is inversely proportional to SNR. Unlike the existing MUSIC algorithm, the proposed algorithm has less computational complexity as it eliminates the need of estimating the number of signals and the eigenvalue decomposition of covariance matrix. Also it outperforms MUSIC algorithm, the recently proposed MUSIC-Like algorithm and classical methods by achieving better resolution with narrow width of peaks.
Bibliography:In this paper, a novel DOA estimation methodology based upon the technology of adaptive nulling antenna is proposed. Initially, the nulling antenna obtains the weight vector by LMS algorithm and power inversion criterion.Afterwards, reciprocal of the antenna pattern is defined as the spatial spectrum and the extracted peak values are corresponded to the estimated DOA. Through observation of the spectrum and data analysis of variable steps and SNRs, the simulation results demonstrate that the proposed method can estimate DOA above board. Furthermore, the estimation error of the proposed technique is directly proportional to step size and is inversely proportional to SNR. Unlike the existing MUSIC algorithm, the proposed algorithm has less computational complexity as it eliminates the need of estimating the number of signals and the eigenvalue decomposition of covariance matrix. Also it outperforms MUSIC algorithm, the recently proposed MUSIC-Like algorithm and classical methods by achieving better resolution with narrow width of peaks.
DOA estimation adaptive filtering power inversion array signal processing
11-5439/TN
ISSN:1673-5447
DOI:10.1109/CC.2016.7897554