DOA estimation of wideband sources without estimating the number of sources

In this paper, we propose a new technique to estimate wideband source directions from the sensor snapshots without requiring to know the number of sources present in the scenario. This work is motivated by the fact that the existing model order estimation (number of sources) techniques for wideband...

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Main Authors: Reddy, Vinod Veera, Ng, B. P., Zhang, Ying, Khong, Andy Wai Hoong
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/97883
http://hdl.handle.net/10220/12053
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-978832020-03-07T14:02:44Z DOA estimation of wideband sources without estimating the number of sources Reddy, Vinod Veera Ng, B. P. Zhang, Ying Khong, Andy Wai Hoong School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering In this paper, we propose a new technique to estimate wideband source directions from the sensor snapshots without requiring to know the number of sources present in the scenario. This work is motivated by the fact that the existing model order estimation (number of sources) techniques for wideband source scenario are either inaccurate or computationally expensive. Direction-of-arrival (DOA) estimation is realized using a beamformer framework which imposes nulls in the spatial spectrum along the source directions. The null width along the frequency axis is widened by introducing a new data dependent term into the optimization problem, thus achieving wideband capability. Furthermore, the temporal processing of the data snapshots drastically reduces the number of snapshots required for wideband DOA estimation. The effectiveness of the proposed formulation is studied with simulated experiments. 2013-07-23T04:11:01Z 2019-12-06T19:47:39Z 2013-07-23T04:11:01Z 2019-12-06T19:47:39Z 2011 2011 Journal Article Reddy, V. V., Ng, B. P., Zhang, Y., & Khong, A. W. (2012). DOA estimation of wideband sources without estimating the number of sources. Signal Processing, 92(4), 1032-1043. Reddy, V. V., Ng, B. P., Zhang, Y., & Khong, A. W. H. (2012). DOA estimation of wideband sources without estimating the number of sources. Signal Processing, 92(4), 1032-1043. 0165-1684 https://hdl.handle.net/10356/97883 http://hdl.handle.net/10220/12053 10.1016/j.sigpro.2011.10.015 en Signal processing © 2011 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Reddy, Vinod Veera
Ng, B. P.
Zhang, Ying
Khong, Andy Wai Hoong
DOA estimation of wideband sources without estimating the number of sources
description In this paper, we propose a new technique to estimate wideband source directions from the sensor snapshots without requiring to know the number of sources present in the scenario. This work is motivated by the fact that the existing model order estimation (number of sources) techniques for wideband source scenario are either inaccurate or computationally expensive. Direction-of-arrival (DOA) estimation is realized using a beamformer framework which imposes nulls in the spatial spectrum along the source directions. The null width along the frequency axis is widened by introducing a new data dependent term into the optimization problem, thus achieving wideband capability. Furthermore, the temporal processing of the data snapshots drastically reduces the number of snapshots required for wideband DOA estimation. The effectiveness of the proposed formulation is studied with simulated experiments.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Reddy, Vinod Veera
Ng, B. P.
Zhang, Ying
Khong, Andy Wai Hoong
format Article
author Reddy, Vinod Veera
Ng, B. P.
Zhang, Ying
Khong, Andy Wai Hoong
author_sort Reddy, Vinod Veera
title DOA estimation of wideband sources without estimating the number of sources
title_short DOA estimation of wideband sources without estimating the number of sources
title_full DOA estimation of wideband sources without estimating the number of sources
title_fullStr DOA estimation of wideband sources without estimating the number of sources
title_full_unstemmed DOA estimation of wideband sources without estimating the number of sources
title_sort doa estimation of wideband sources without estimating the number of sources
publishDate 2013
url https://hdl.handle.net/10356/97883
http://hdl.handle.net/10220/12053
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