Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations
In broadband beamformer applications with dynamically moving sources, it can be important to have a simple mechanism to steer the main-beam. It can also be desirable if the beampattern of the beamformer is invariant to the look direction. A number of design methods for such beamformers, based on the...
| Main Authors: | , , |
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| Format: | Journal Article |
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Institute of Electrical and Electronics Engineers
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/33823 |
| _version_ | 1848754053571411968 |
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| author | Lai, Chiong Ching Nordholm, Sven Leung, Yee-Hong |
| author_facet | Lai, Chiong Ching Nordholm, Sven Leung, Yee-Hong |
| author_sort | Lai, Chiong Ching |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In broadband beamformer applications with dynamically moving sources, it can be important to have a simple mechanism to steer the main-beam. It can also be desirable if the beampattern of the beamformer is invariant to the look direction. A number of design methods for such beamformers, based on the spherical harmonic transform, have been reported in the literature. However, these methods require the sensor positions to satisfy a certain condition which may conflict with practical considerations. This paper proposes a design method which obviates this restriction thus allowing for spherical arrays with arbitrary sensor configurations. Moreover, for a comparable level of performance and computational complexity to the existing spherical harmonic beamformers, the proposed beamformer requires fewer sensors. The trade-off is that the design of the beamformer now depends on the sensor positions. Other considerations, such as the effects of array misorientation and robustness, are also discussed in this paper and illustrated by design examples. |
| first_indexed | 2025-11-14T08:34:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-33823 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:34:18Z |
| publishDate | 2013 |
| publisher | Institute of Electrical and Electronics Engineers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-338232017-09-13T15:32:49Z Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations Lai, Chiong Ching Nordholm, Sven Leung, Yee-Hong steerable array orthonormality sensor configuration Broadband beamformer spherical harmonics In broadband beamformer applications with dynamically moving sources, it can be important to have a simple mechanism to steer the main-beam. It can also be desirable if the beampattern of the beamformer is invariant to the look direction. A number of design methods for such beamformers, based on the spherical harmonic transform, have been reported in the literature. However, these methods require the sensor positions to satisfy a certain condition which may conflict with practical considerations. This paper proposes a design method which obviates this restriction thus allowing for spherical arrays with arbitrary sensor configurations. Moreover, for a comparable level of performance and computational complexity to the existing spherical harmonic beamformers, the proposed beamformer requires fewer sensors. The trade-off is that the design of the beamformer now depends on the sensor positions. Other considerations, such as the effects of array misorientation and robustness, are also discussed in this paper and illustrated by design examples. 2013 Journal Article http://hdl.handle.net/20.500.11937/33823 10.1109/TASL.2012.2219527 Institute of Electrical and Electronics Engineers fulltext |
| spellingShingle | steerable array orthonormality sensor configuration Broadband beamformer spherical harmonics Lai, Chiong Ching Nordholm, Sven Leung, Yee-Hong Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title | Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title_full | Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title_fullStr | Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title_full_unstemmed | Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title_short | Design of Steerable Spherical Broadband Beamformers with Flexible Sensor Configurations |
| title_sort | design of steerable spherical broadband beamformers with flexible sensor configurations |
| topic | steerable array orthonormality sensor configuration Broadband beamformer spherical harmonics |
| url | http://hdl.handle.net/20.500.11937/33823 |