In this paper, we present a novel design criterion for low-density parity-check (LDPC)-coded modulations based on the concatenation of an LDPC code with a coded modulator (CM) tailored for the specific transmission channel. Although we use an analysis based on extrinsic information transfer (EXIT) charts, we focus on the bit error rate (BER) performance as opposed to the convergence threshold. First, we characterize the convergence behavior of the decoding process as a function of the LDPC code degree distributions. Then, the BER performance is accurately estimated by deriving upper and lower bounds as functions of the extrinsic information.
LDPC-coded modulations: performance bounds and a novel design criterion / Franceschini, M; Ferrari, Gianluigi; Raheli, Riccardo. - (2006), pp. 1-6. (Intervento presentato al convegno 2006 4th International Symposium on Turbo Codes&Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING) tenutosi a Munich, Germany nel April 2006).
LDPC-coded modulations: performance bounds and a novel design criterion
FERRARI, Gianluigi;RAHELI, Riccardo
2006-01-01
Abstract
In this paper, we present a novel design criterion for low-density parity-check (LDPC)-coded modulations based on the concatenation of an LDPC code with a coded modulator (CM) tailored for the specific transmission channel. Although we use an analysis based on extrinsic information transfer (EXIT) charts, we focus on the bit error rate (BER) performance as opposed to the convergence threshold. First, we characterize the convergence behavior of the decoding process as a function of the LDPC code degree distributions. Then, the BER performance is accurately estimated by deriving upper and lower bounds as functions of the extrinsic information.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
