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2010

On the Performance of Single LDGM Codes for Iterative Data Fusion over the Multiple Access Channel

11 years 8 months ago
On the Performance of Single LDGM Codes for Iterative Data Fusion over the Multiple Access Channel
One of the applications of wireless sensor networks currently undergoing active research focuses on the scenario where the information generated by a data source S is simultaneously sensed by N nodes and therefrom transmitted to a common receiver. Based on the received information from such N nodes, such receiver infers the original information from S potentially more accurately than in the case of a single sensor. Often referred to as the CEO (Central Estimating Officer) problem [1], in this scenario we propose the use of single Low Density Generator Matrix (LDGM) codes for the transmission of the information registered by the nodes over the Multiple Access Channel (MAC). The corresponding receiver iterates between a soft demodulator, the set of N LDGM decoders and a soft-information fusion stage. Simulation results for the AWGN MAC channel show that 1) the proposed coding scheme outperforms the suboptimum limit assuming separated Slepian-Wolf distributed coding and capacity-approachi...
Javier Del Ser, Javier Garcia-Frias, Pedro M. Cres
Added 20 May 2011
Updated 20 May 2011
Type Journal
Year 2010
Where MACOM
Authors Javier Del Ser, Javier Garcia-Frias, Pedro M. Crespo, Diana Manjarres, Ignacio (Iñaki) Olabarrieta
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