TY - GEN
T1 - Improving BER performance of LDPC codes based on intermediate decoding results
AU - Alghonaim, Esa
AU - Landolsi, Mohamed Adnan
AU - El-Maleh, Aiman
PY - 2007
Y1 - 2007
N2 - The paper presents a novel approach to reduce the bit error rate (BER) in iterative belief propagation (BP) decoding of low density parity check (LDPC) codes. The behavior of the BP algorithm is first investigated as a function of number of decoder iterations, and it is shown that typical uncorrected error patterns can be classified into 3 categories: oscillating, nearly-constant, or randomlike, with a predominance of oscillating patterns at high Signal-to-Noise (SNR) values. A proposed decoder modification is then introduced based on tracking the number of failed parity check equations in the intermediate decoding iterations, rather than relying on the final decoder output (after reaching the maximum number of iterations). Simulation results with a rate 1/2 (1024, 512) progressive edge-growth (PEG) LDPC code show that the proposed modification can decrease the BER by as much as 10-to-40%, particularly for high SNR values.
AB - The paper presents a novel approach to reduce the bit error rate (BER) in iterative belief propagation (BP) decoding of low density parity check (LDPC) codes. The behavior of the BP algorithm is first investigated as a function of number of decoder iterations, and it is shown that typical uncorrected error patterns can be classified into 3 categories: oscillating, nearly-constant, or randomlike, with a predominance of oscillating patterns at high Signal-to-Noise (SNR) values. A proposed decoder modification is then introduced based on tracking the number of failed parity check equations in the intermediate decoding iterations, rather than relying on the final decoder output (after reaching the maximum number of iterations). Simulation results with a rate 1/2 (1024, 512) progressive edge-growth (PEG) LDPC code show that the proposed modification can decrease the BER by as much as 10-to-40%, particularly for high SNR values.
KW - BER performance
KW - Belief propagation iterative decoding
KW - Error correction coding
KW - LDPC codes
UR - https://www.scopus.com/pages/publications/60349112027
U2 - 10.1109/ICSPC.2007.4728627
DO - 10.1109/ICSPC.2007.4728627
M3 - Conference contribution
AN - SCOPUS:60349112027
SN - 9781424412365
T3 - ICSPC 2007 Proceedings - 2007 IEEE International Conference on Signal Processing and Communications
SP - 1547
EP - 1550
BT - ICSPC 2007 Proceedings - 2007 IEEE International Conference on Signal Processing and Communications
ER -