TY - GEN
T1 - Blind synchronization in wireless sensor networks with application to speech enhancement
AU - Cherkassky, Dani
AU - Gannot, Sharon
N1 - Publisher Copyright: © 2014 IEEE.
PY - 2014/11/11
Y1 - 2014/11/11
N2 - 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.
AB - 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.
KW - Blind synchronization
KW - Sampling rate offset
KW - Wideband correlation processing
KW - Wireless acoustic sensor network
UR - http://www.scopus.com/inward/record.url?scp=84936758996&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/iwaenc.2014.6954003
DO - https://doi.org/10.1109/iwaenc.2014.6954003
M3 - منشور من مؤتمر
T3 - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
SP - 183
EP - 187
BT - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
Y2 - 8 September 2014 through 11 September 2014
ER -