Design, implementation and applications of low-complexity LDPC codes

Honary, Bahram and Momahed Heravi, Behzad and Kariyawasam Katukolihe Ga, Sharadha and Pandya, Nishit (2008) Design, implementation and applications of low-complexity LDPC codes. In: 2nd International Conference on Signal Processing and Telecommunication Systems, ICSPCS'2008. IEEE, Gold Coast, Australia. ISBN 978-1-4244-4243-0

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Abstract

Structured LDPC codes enable low-complexity decoding as well as efficient implementation of encoder reducing the complexity down to the order of the number of parity-check bits. Construction of structured LDPC codes is based on combinatorial approaches such as balanced-incomplete block-design (BIBD) and finite fields to design quasi-cyclic LDPC (QC-LDPC) codes. Well designed QC-LDPC codes can perform as well as randomly constructed LDPC codes with iterative decoding based on belief propagation in terms of bit-error probability. It has been shown that QC-LDPC codes can achieve lower error floor than randomly constructed LDPC codes. Within this work, the design of quasi-cyclic LDPC codes for a range of practical applications is discussed which includes construction of variable-rate large-block-length LDPC codes for DVB-S2 and DVB-T2 applications and adaptive short-block-length LDPC codes for HF applications. Moreover, efficient implementation of QC-LDPC decoder/encoder for FPGA devices which reduces memory requirements is presented.

Item Type:
Contribution in Book/Report/Proceedings
ID Code:
60950
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Deposited On:
11 Jan 2013 11:27
Refereed?:
No
Published?:
Published
Last Modified:
15 Nov 2020 09:12