Conference Paper

Application of Protograph-based LDPC-Codes for UWB Short Range Communication

Dept. of Mobile Commun., Dresden Univ. of Technol., Dresden, Germany
DOI: 10.1109/ICUWB.2010.5616834 Conference: International Conference on Ultra Wideband (ICUWB'10)
Source: IEEE Xplore

ABSTRACT We studied the behavior of an iterative receiver using protograph based LDPC codes (PG-LDPCC) in an UWB short range communication system. An EXIT-Chart-Analysis is applied by means of density evolution of protographs. We show that AWGN-optimized protograph ensembles perform also well on frequency-flat UWB channels, outperform rate-compatible punctured convolutional codes (RCPC), but degrade with increasing intersymbol interference (ISI). Slight modifications of the underlying protograph can improve this performance, but lead to a trade-off between the minimum required SNR and the minimum achievable BER. It is shown that both thresholds can be predicted by the applied tools.

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