TY - GEN
T1 - LDPC code design for OFDM channel
T2 - ISSCS 2005: International Symposium on Signals, Circuits and Systems
AU - De Baynast, Alexandre
AU - Sabharwal, Ashutosh
AU - Aazhang, Behnaam
PY - 2005
Y1 - 2005
N2 - 1 We present an optimized channel coding scheme for OFDM transmission. In the future wireless standards such IEEE 802.11n, frame error rates (FER) as low as 0.0001 are targeting. Irregular LDPC codes have excellent performance at moderate computational complexity: they are strong candidates for channel coding in such systems. In the context of an OFDM transmission, the authors in [Mannoni, 2002] proposed to optimize the graph connectivity of the irregular LDPC code accordingly to the channel spectrum. However, their codes did not have good performance for a FER range of 0.001-0.0001. In this paper, we propose to optimize the LDPC code in two steps: first, we optimize the graph connectivity in order to get a minimum operational average SNR and therefore excellent FER; then we optimize the Information bits placement accordingly to the channel. By simulation, we show that our approach provides substantial performance gain in term of FER over the existing methods (1 dB or more for FER equal to 10 -4).
AB - 1 We present an optimized channel coding scheme for OFDM transmission. In the future wireless standards such IEEE 802.11n, frame error rates (FER) as low as 0.0001 are targeting. Irregular LDPC codes have excellent performance at moderate computational complexity: they are strong candidates for channel coding in such systems. In the context of an OFDM transmission, the authors in [Mannoni, 2002] proposed to optimize the graph connectivity of the irregular LDPC code accordingly to the channel spectrum. However, their codes did not have good performance for a FER range of 0.001-0.0001. In this paper, we propose to optimize the LDPC code in two steps: first, we optimize the graph connectivity in order to get a minimum operational average SNR and therefore excellent FER; then we optimize the Information bits placement accordingly to the channel. By simulation, we show that our approach provides substantial performance gain in term of FER over the existing methods (1 dB or more for FER equal to 10 -4).
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U2 - 10.1109/ISSCS.2005.1511324
DO - 10.1109/ISSCS.2005.1511324
M3 - Conference contribution
AN - SCOPUS:33749058496
SN - 0780390296
SN - 9780780390294
T3 - ISSCS 2005: International Symposium on Signals, Circuits and Systems - Proceedings
SP - 649
EP - 652
BT - ISSCS 2005
Y2 - 14 July 2005 through 15 July 2005
ER -