Minimizing Transmit Power for Coherent Communications in Wireless Sensor Networks With Finite-Rate Feedback
In: IEEE transactions on signal processing, Jg. 56 (2008), Heft 9, S. 4446-4457
Online
academicJournal
- print, 26 ref
Zugriff:
We minimize average transmit power with finite-rate feedback for coherent communications in a wireless sensor network (WSN), where sensors communicate with a fusion center using adaptive modulation and coding over a wireless fading channel. By viewing the coherent WSN setup as a distributed space-time multiple-input single-output (MISO) system, we present optimal distributed beamforming and resource allocation strategies when the full (F-) channel state information at the transmitters (CSIT) is available through a feedback channel. We also develop optimal adaptive transmission policies and design optimal quantizers for the finite-rate feedback case where the sensors only have quantized (Q-) CSIT, or, each sensor has F-CSIT of its own link with the FC but only Q-CSIT of other sensors. Numerical results confirm that our novel finite-rate feedback-based strategies achieve near-optimal power savings based on even a small number of feedback bits.
Titel: |
Minimizing Transmit Power for Coherent Communications in Wireless Sensor Networks With Finite-Rate Feedback
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Autor/in / Beteiligte Person: | MARQUES, Antonio G ; XIN, WANG ; GIANNAKIS, Georgios B |
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Zeitschrift: | IEEE transactions on signal processing, Jg. 56 (2008), Heft 9, S. 4446-4457 |
Veröffentlichung: | New York, NY: Institute of Electrical and Electronics Engineers, 2008 |
Medientyp: | academicJournal |
Umfang: | print, 26 ref |
ISSN: | 1053-587X (print) |
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