WSEAS Transactions on Computers
Print ISSN: 1109-2750, E-ISSN: 2224-2880
Volume 14, 2015
Comparative Analysis of Turbo and LDPC Codes for Reduced Storage and Retrieval of Data Reduced Storage and Retrieval of Data
Authors: , ,
Abstract: Turbo codes are the channel coding scheme used in wireless cellular networks as they are able to reach close to the Shannon limit. This paper proposes the use of turbo codes and LDPC codes for storage of data. Turbo encoding can be performed by using parallel Recursive Systematic Convolutional (RSC) encoder and an interleaver while turbo decoding is based on Bahl Cocke Jelinek and Raviv (BCJR) algorithm, the Maximum Aposterior Algorithm (MAP).Low Density Parity-Check (LDPC) codes encoding technique are based on the generator matrix value of the original code word to be identified. In LDPC decoding Hard-decision decoding algorithm is followed. Finally, a comparative analysis on turbo and LDPC codes is presented. Theoretical and experimental results show turbo codes perform better than LDPC codes.
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Keywords: BCJR algorithm, Check nodes, encoding algorithm, Hard-decision decoding algorithm, LDPC codes, Turbo codes, Variable nodes
Pages: 142-151
WSEAS Transactions on Computers, ISSN / E-ISSN: 1109-2750 / 2224-2880, Volume 14, 2015, Art. #15