Abstract
In wireless acoustic sensor networks (WASNs), sampling rate offsets (SROs) between nodes are inevitable, and recognized as one of the challenges that have to be resolved for a coherent array processing. A simplified free-space propagation is considered with a single desired source impinging a WASNs from the far-field and contaminated by a diffuse noise. In this paper, we analyze the theoretical performance of a fixed superdirective beamformer (SDBF) in presence of SROs. The SDBF performance loss due to SROs is manifested as a distortion of the nominal beampattern and an excess noise power at the output of the beamformer. We also propose an iterative algorithm for SROs estimation. The theoretical results are validated by simulation.
| Original language | English |
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| Title of host publication | 2015 23rd European Signal Processing Conference, EUSIPCO 2015 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 245-249 |
| Number of pages | 5 |
| ISBN (Electronic) | 9780992862633 |
| DOIs | |
| State | Published - 22 Dec 2015 |
| Event | 23rd European Signal Processing Conference, EUSIPCO 2015 - Nice, France Duration: 31 Aug 2015 → 4 Sep 2015 |
Publication series
| Name | 2015 23rd European Signal Processing Conference, EUSIPCO 2015 |
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Conference
| Conference | 23rd European Signal Processing Conference, EUSIPCO 2015 |
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| Country/Territory | France |
| City | Nice |
| Period | 31/08/15 → 4/09/15 |
Bibliographical note
Publisher Copyright:© 2015 EURASIP.
Keywords
- Blind synchronization
- Sampling rate offset
- Wireless acoustic sensor network