TY - GEN
T1 - Performance analysis of MVDR beamformer in WASN with sampling rate offsets and blind synchronization
AU - Cherkassky, Dani
AU - Markovich-Golan, Shmulik
AU - Gannot, Sharon
N1 - Publisher Copyright: © 2015 EURASIP.
PY - 2015/12/22
Y1 - 2015/12/22
N2 - 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.
AB - 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.
KW - Blind synchronization
KW - Sampling rate offset
KW - Wireless acoustic sensor network
UR - http://www.scopus.com/inward/record.url?scp=84963984759&partnerID=8YFLogxK
U2 - 10.1109/eusipco.2015.7362382
DO - 10.1109/eusipco.2015.7362382
M3 - منشور من مؤتمر
T3 - 2015 23rd European Signal Processing Conference, EUSIPCO 2015
SP - 245
EP - 249
BT - 2015 23rd European Signal Processing Conference, EUSIPCO 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 23rd European Signal Processing Conference, EUSIPCO 2015
Y2 - 31 August 2015 through 4 September 2015
ER -