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...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/97883 http://hdl.handle.net/10220/12053 |
| _version_ | 1826121518899265536 |
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| author | Reddy, Vinod Veera Ng, B. P. Zhang, Ying Khong, Andy Wai Hoong |
| 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 |
| author_sort | Reddy, Vinod Veera |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T05:33:34Z |
| format | Journal Article |
| id | ntu-10356/97883 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:33:34Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-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. |
| 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 |
| title | 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_short | DOA estimation of wideband sources without estimating the number of sources |
| title_sort | doa estimation of wideband sources without estimating the number of sources |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/97883 http://hdl.handle.net/10220/12053 |
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