Underdetermined DOA estimation via multiple time-delay covariance matrices and deep residual network

doi:10.23919/JSEE.2021.000115

Journal of Systems Engineering and Electronics ›› 2021, Vol. 32 ›› Issue (6): 1354-1363.doi: 10.23919/JSEE.2021.000115

• ELECTRONICS TECHNOLOGY • Previous Articles Next Articles

Underdetermined DOA estimation via multiple time-delay covariance matrices and deep residual network

Ying CHEN(), Xiang WANG*(), Zhitao HUANG()

¹ State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China

Received:2021-02-19 Online:2022-01-05 Published:2022-01-05
Contact: Xiang WANG E-mail:chenying_nudt@163.com;christopherwx@163.com;tald_paper@163.com
About author:|CHEN Ying was born in 1995. She is a Ph.D. student in the State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology. Her research interests are array signal processing and deep learning. E-mail: chenying_nudt@163.com||WANG Xiang was born in 1985. He received his B.S. and Ph.D. degrees in information and communication engineering in 2007 and 2013, respectively, from the College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China. Currently, he is a lecturer in the National University of Defense Technology, Changsha, Hunan, China His research interests include blind signal separation and non-cooperative signal processing in radar and communication applications. E-mail: christopherwx@163.com||HUANG Zhitao was born in 1976. He received his B.S. and Ph.D. degrees in information and communication engineering in 1998 and 2003, respectively, from the College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China. He is now a professor with the College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China. His research interests include radar and communication signal processing, and array signal processing. E-mail: tald_paper@163.com
Supported by:
This work was supported by the Program for Innovative Research Groups of the Hunan Provincial Natural Science Foundation of China (2019JJ10004)

Abstract

Abstract:

Higher-order statistics based approaches and signal sparseness based approaches have emerged in recent decades to resolve the underdetermined direction-of-arrival (DOA) estimation problem. These model-based methods face great challenges in practical applications due to high computational complexity and dependence on ideal assumptions. This paper presents an effective DOA estimation approach based on a deep residual network (DRN) for the underdetermined case. We first extract an input feature from a new matrix calculated by stacking several covariance matrices corresponding to different time delays. We then provide the input feature to the trained DRN to construct the super resolution spectrum. The DRN learns the mapping relationship between the input feature and the spatial spectrum by training. The proposed approach is superior to existing model-based estimation methods in terms of calculation efficiency, independence of source sparseness and adaptive capacity to non-ideal conditions (e.g., low signal to noise ratio, short bit sequence). Simulations demonstrate the validity and strong performance of the proposed algorithm on both overdetermined and underdetermined cases.

Key words: direction-of-arrival (DOA) estimation, underdetermined condition, deep residual network (DRN), time delay, covariance matrix

Ying CHEN, Xiang WANG, Zhitao HUANG. Underdetermined DOA estimation via multiple time-delay covariance matrices and deep residual network[J]. Journal of Systems Engineering and Electronics, 2021, 32(6): 1354-1363.

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Parameter	$\boldsymbol{\bar R}$ -DRN	${\boldsymbol{\bar R}_r}$ -DRN	${\boldsymbol{\bar R}_{sp}}$ -DRN
Input dimension	$2 \times 36$	$1 \times 12$	$2 \times 121$
Total parameters	14 291	5 354	45 146
Training time	10 min 25 s	3 min 15 s	25 min 10 s

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Underdetermined DOA estimation via multiple time-delay covariance matrices and deep residual network

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