RT Journal Article
T1 Iterative fusion of distributed decisions over the gaussian multiple-access channel using concatenated BCH-LDGM codes
A1 Del Ser, Javier
A1 Manjarres, Diana
A1 Crespo, Pedro M.
A1 Gil-Lopez, Sergio
A1 Garcia-Frias, Javier
AB This paper focuses on the data fusion scenario where N nodes sense and transmit the data generated by a source S to a common destination, which estimates the original information from S more accurately than in the case of a single sensor. This work joins the upsurge of research interest in this topic by addressing the setup where the sensed information is transmitted over a Gaussian Multiple-Access Channel (MAC). We use Low Density Generator Matrix (LDGM) codes in order to keep the correlation between the transmitted codewords, which leads to an improved received Signal-to-Noise Ratio (SNR) thanks to the constructive signal addition at the receiver front-end. At reception, we propose a joint decoder and estimator that exchanges soft information between the N LDGM decoders and a data fusion stage. An error-correcting Bose, Ray-Chaudhuri, Hocquenghem (BCH) code is further applied suppress the error floor derived from the ambiguity of the MAC channel when dealing with correlated sources. Simulation results are presented for several values of N and diverse LDGM and BCH codes, based on which we conclude that the proposed scheme outperforms significantly (by up to 6.3dB) the suboptimum limit assuming separation between Slepian-Wolf source coding and capacity-achieving channel coding.
SN 1687-1472
YR 2011
FD 2011
LK https://hdl.handle.net/11556/3830
UL https://hdl.handle.net/11556/3830
LA eng
NO Del Ser , J , Manjarres , D , Crespo , P M , Gil-Lopez , S & Garcia-Frias , J 2011 , ' Iterative fusion of distributed decisions over the gaussian multiple-access channel using concatenated BCH-LDGM codes ' , Eurasip Journal on Wireless Communications and Networking , vol. 2011 , 825327 . https://doi.org/10.1155/2011/825327
NO This work was supported in part by the Spanish Ministry of Science and Innovation through the CONSOLIDER-INGENIO (CSD200800010) and the Torres-Quevedo (PTQ-09-01-00740) funding programs and by the Basque Government through the ETORTEK programme (Future Internet EI08-227 project).
DS TECNALIA Publications
RD 31 jul 2024