TY - GEN
T1 - Minimizing transmit-power for coherent communications in wireless sensor networks using quantized channel state information
AU - Marques, Antonio G.
AU - Wang, Xin
AU - Giannakis, Georgios B
PY - 2007
Y1 - 2007
N2 - We consider minimizing average transmit-power with finite-rate feedback for coherent communications in a wireless sensor network (WSN), where sensors communicate with a fusion center (FC) using adaptive modulation and coding over a wireless fading channel. By viewing the coherent WSN setup as a distributed space-time multi-input single-output (MISO) system, we develop beamforming and resource allocation strategies and design optimal quantizers when the sensors only have available quantized (Q-) channel state information at the transmitters (CSIT) through a finite-rate feedback channel. Numerical results reveal that our novel design based on Q-CSIT yields significant power savings even for a small number of feedback bits.
AB - We consider minimizing average transmit-power with finite-rate feedback for coherent communications in a wireless sensor network (WSN), where sensors communicate with a fusion center (FC) using adaptive modulation and coding over a wireless fading channel. By viewing the coherent WSN setup as a distributed space-time multi-input single-output (MISO) system, we develop beamforming and resource allocation strategies and design optimal quantizers when the sensors only have available quantized (Q-) channel state information at the transmitters (CSIT) through a finite-rate feedback channel. Numerical results reveal that our novel design based on Q-CSIT yields significant power savings even for a small number of feedback bits.
KW - MISO systems
KW - Minimum energy control
KW - Multi-sensor systems
KW - Optimization methods
KW - Quantization
UR - http://www.scopus.com/inward/record.url?scp=34547512922&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547512922&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2007.366589
DO - 10.1109/ICASSP.2007.366589
M3 - Conference contribution
AN - SCOPUS:34547512922
SN - 1424407281
SN - 9781424407286
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 529
EP - 532
BT - 2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2007 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '07
Y2 - 15 April 2007 through 20 April 2007
ER -