Title :
Multilevel-Structured Low-Density Parity-Check Codes for AWGN and Rayleigh Channels
Author :
Bonello, Nicholas ; Chen, Sheng ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK
Abstract :
We propose a novel class of protograph low-density parity-check (LDPC) codes having a combinatorial rather than a random structure, which are termed multilevel-structured (MLS) LDPC codes. It is demonstrated that they posses a strikingly simple structure and, thus, benefit from reduced storage requirements, hardware-friendly implementations, and low-complexity encoding. Our simulation results provided for both additive white Gaussian noise (AWGN) and uncorrelated Rayleigh (UR) channels demonstrate that these advantages accrue without compromising the attainable bit error ratio (BER) and block error ratio (BLER) performance, when compared with their previously proposed more complex random-construction-based counterparts, as well as with other structured codes of the same length.
Keywords :
AWGN channels; Rayleigh channels; error statistics; parity check codes; AWGN; BER; additive white Gaussian noise; bit error ratio; block error ratio; multilevel-structured LDPC codes; multilevel-structured low-density parity-check codes; uncorrelated Rayleigh channels; AWGN; Hardware; Iterative decoding; Multilevel systems; Parity check codes; Permission; Phase change materials; Radio access networks; Rayleigh channels; World Wide Web; Low-complexity low-density parity check (LDPC); multilevel structured (MLS); protograph LDPC codes; quasi-cyclic (QC);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2010.2050708