Title :
Joint Source Channel Coding Using LDPC Codes
Author :
Nandan, S. ; Deepthi, P.P.
Author_Institution :
Dept. of Electron. & Commun., Mar Baselios Coll. of Eng. & Technol., Thiruvananthapuram, India
Abstract :
A novel method of combined source-channel coding using LDPC codes is presented in this paper. The system presented is designed to transmit a discrete time, continuous amplitude signal over an Additive White Gaussian Noise (AWGN) channel where a Low Density Parity Check (LDPC) code is used for error correction purposes. LDPC code is a channel coding technique that provides performance near to Shannon´s limit. To achieve optimum decoding, Sum-Product or message passing decoding is used for LDPC codes. Code puncturing can be implemented to obtain different code rates and this can be used for implementing joint source channel coding. Here, Source coding and Channel coding can be done in a single step using LDPC codes by puncturing the transmitted information so as to make the rate greater than or equal to the entropy of the source.
Keywords :
channel coding; decoding; entropy codes; error correction; message passing; parity check codes; source coding; AWGN channel; LDPC codes; Shannon limit; additive white Gaussian noise; code puncturing; combined source-channel coding; continuous amplitude signal; discrete time; entropy; error correction; joint source channel coding; low density parity check code; message passing decoding; optimum decoding; Channel coding; Decoding; Entropy; Joints; Parity check codes; Source coding; Code Puncturing; Joint Source Channel Coding; Low Density Parity Check codes; Sum-Product decoding;
Conference_Titel :
Computational Intelligence and Communication Networks (CICN), 2012 Fourth International Conference on
Conference_Location :
Mathura
Print_ISBN :
978-1-4673-2981-1
DOI :
10.1109/CICN.2012.135
