Performance of a Simplified Soft-Distance decoding algorithm for LDPC codes over the Rayleigh fading channel

ARNONE, L. J.; LIBERATORI, M. C.; PETRUZZI, D. M.; CASTIÑEIRA MOREIRA, J.

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Lugar: Bahia Blanca; Año: 2013 vol. 43 p. 219 - 223

0327-0793

In this paper, we investigate the per-formance of a Soft-Input soft-Output decoding algorithm for LDPC codes that uses Euclidean distance as its metric, in the Rayleigh fading channel. It is found thatits Bit Error Rate performance is close to that of traditional decoding algorithms like the Sum-Product algorithm and its logarithmic version. Main characteristics of the proposed algorithm and its modification to perform over the Rayleigh channel are described. This algorithm uses squared Euclid-ean distance as the metric, does not require knowl-edge of the signal-to-noise ratio of the received sig-nal, and is less complex to implement than other soft-input, soft-output algorithms.