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Beamforming Algorithms for Information Relaying in Wireless Sensor Networks.
- Source :
- IEEE Transactions on Signal Processing; Oct2008 Part 1 of 2, Vol. 56 Issue 10, p4772-4784, 13p, 2 Black and White Photographs, 3 Diagrams, 8 Graphs
- Publication Year :
- 2008
-
Abstract
- We develop beamforming algorithms for information relaying over shared slowly nonselective fading channels in wireless sensor networks. We assume that, prior to beamforming their received data to a destination, the relays preprocess them by either data amplifying or decoding. The beamforming weights are broadcasted by the destination to the relays and are formed based on the individual relay-destination channel coefficients and an m-bit description of the quality of each source-relay channel. For both relay data-preprocessing models, we present methods for optimizing the m-bit quantizer employed at each relay for encoding its source-relay channel quality level, and for choosing the beamforming weights at the destination, so as optimize the destination uncoded bit error rates. As our simulations and analysis reveal, a coarse single-bit description of each source-relay channel coefficient at the destination may suffice, as it results in only a small increase in uncoded bit error rates with respect to the case where full knowledge of the source-relay channel coefficients are exploited at the destination. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1053587X
- Volume :
- 56
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 34598170
- Full Text :
- https://doi.org/10.1109/TSP.2008.923806