Abstract
The sampling rate offset (SRO) phenomenon in wireless acoustic sensor network (WASN) is considered in this work. The use of different clock sources in each node results in a drift between the nodes' signals. The aim of this work is to estimate these SROs and to re-synchronize the network, enabling coherent multi-microphone processing. First, the link between SRO and the Doppler effect is driven. Then, a wideband correlation processor for SRO estimation, which is equivalent to continuous wavelet transform (CWT), is proposed. Finally, the node synchronization is achieved by re-sampling the signals at each node. Experimental study using an actual WASN, demonstrates the ability of the proposed algorithm to re-synchronize the network and to regain the performance loss due to SRO.
| Original language | English |
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| Title of host publication | 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 183-187 |
| Number of pages | 5 |
| ISBN (Electronic) | 9781479968084 |
| DOIs | |
| State | Published - 11 Nov 2014 |
| Event | 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 - Juan-les-Pins, France Duration: 8 Sep 2014 → 11 Sep 2014 |
Publication series
| Name | 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 |
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Conference
| Conference | 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 |
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| Country/Territory | France |
| City | Juan-les-Pins |
| Period | 8/09/14 → 11/09/14 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
Keywords
- Blind synchronization
- Sampling rate offset
- Wideband correlation processing
- Wireless acoustic sensor network