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Limits in FIR Subband Beamforming for Spatially Spread Nearfield Sources

Grbic, Nedelko LU ; Nordholm, Sven and Cantoni, Antonio (2003) IEEE International Symposium on Circuits and Systems (ISCAS '03), 2003 In Proceedings of the 2003 International Symposium on Circuits and Systems. ISCAS '03. 2. p.516-519
Abstract
This paper analyses optimal subband beamforming performance mainly aimed at speech enhancement and acoustic echo suppression for personal communication devices, personal computers and wireless cellular telephones. The focus is on theoretical limits of finite impulse response (FIR) beamformers for spatially spread sources in the array near-field. Performance of the Wiener solution is compared to the direct maximization of the array gain for different lengths of the FIR filters and different source interference spreads. The evaluation is performed individually in subbands with constant increasing logarithmic bandwidth. Results show that the difference between the Wiener solution and the direct array gain maximization is less than 2 dB in the... (More)
This paper analyses optimal subband beamforming performance mainly aimed at speech enhancement and acoustic echo suppression for personal communication devices, personal computers and wireless cellular telephones. The focus is on theoretical limits of finite impulse response (FIR) beamformers for spatially spread sources in the array near-field. Performance of the Wiener solution is compared to the direct maximization of the array gain for different lengths of the FIR filters and different source interference spreads. The evaluation is performed individually in subbands with constant increasing logarithmic bandwidth. Results show that the difference between the Wiener solution and the direct array gain maximization is less than 2 dB in the measure of Signal-to-Noise plus Interference Ratio (SNIR), for small interference spread. With increasing interference spread the difference in SNIR performance increases, in favor of the array gain maximization. (Less)
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author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proceedings of the 2003 International Symposium on Circuits and Systems. ISCAS '03.
volume
2
pages
516 - 519
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Symposium on Circuits and Systems (ISCAS '03), 2003
ISBN
0-7803-7761-3
DOI
10.1109/ISCAS.2003.1206024
language
English
LU publication?
no
id
0fe4b104-14ae-408d-99f9-e3240583e4f9
date added to LUP
2016-06-23 15:35:17
date last changed
2016-06-29 11:52:41
@misc{0fe4b104-14ae-408d-99f9-e3240583e4f9,
  abstract     = {This paper analyses optimal subband beamforming performance mainly aimed at speech enhancement and acoustic echo suppression for personal communication devices, personal computers and wireless cellular telephones. The focus is on theoretical limits of finite impulse response (FIR) beamformers for spatially spread sources in the array near-field. Performance of the Wiener solution is compared to the direct maximization of the array gain for different lengths of the FIR filters and different source interference spreads. The evaluation is performed individually in subbands with constant increasing logarithmic bandwidth. Results show that the difference between the Wiener solution and the direct array gain maximization is less than 2 dB in the measure of Signal-to-Noise plus Interference Ratio (SNIR), for small interference spread. With increasing interference spread the difference in SNIR performance increases, in favor of the array gain maximization.},
  author       = {Grbic, Nedelko and Nordholm, Sven and Cantoni, Antonio},
  isbn         = {0-7803-7761-3},
  language     = {eng},
  pages        = {516--519},
  publisher    = {ARRAY(0x96c88a0)},
  series       = {Proceedings of the 2003 International Symposium on Circuits and Systems. ISCAS '03. },
  title        = {Limits in FIR Subband Beamforming for Spatially Spread Nearfield Sources},
  url          = {http://dx.doi.org/10.1109/ISCAS.2003.1206024 },
  volume       = {2},
  year         = {2003},
}