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Implementation of Cooperative Diversity using Message Passing in Wireless Sensor Networks
 

Summary: 1
Implementation of Cooperative Diversity using
Message Passing in Wireless Sensor Networks
Josephine P. K. Chu1, Raviraj S. Adve2
Edward S. Rogers Sr. Department of Electrical and Computer Engineering
University of Toronto
10 King's College Road
Toronto, Ontario, Canada, M5S 3G4
11-416-978-8672, 21-416-946-7350
1 chuj@comm.utoronto.ca, 2 rsadve@comm.utoronto.ca
Abstract
Cooperative diversity can be achieved by a relay node (R) assisting in a transmission between a source (S) and a destination
(D). However, in general, the proposed cooperation schemes ignore the quality of the S-R channel in the decoding process. This
paper introduces a novel and robust scheme for cooperative diversity that accounts for the quality of the S-R channel. In our
scheme, the relaying node provides parity checks for the estimated source symbols, which are used to assist in the decoding of
the source message using message passing. Performance measures, such as bit error rate, are then not limited by the S-R channel
quality and improve with increasing signal-to-noise ratio on the S-D and R-D channels. No feedback signals are required, with
only simple computations at the relay. Simulations show that, as with earlier proposals, our scheme achieves full diversity order
in the case of a good S-R channel.
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Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto

 

Collections: Engineering