Title :
MAP decoding of MTR codes in LDPC-MTR encoded magnetic recording systems
Author_Institution :
Technical Sciences, University of Novi Sad, Trg D. Obradovica 6, 21000 Novi Sad, Serbia
Abstract :
A MAP algorithm for decoding maximum transition run (MTR) codes, using the soft-decision approach, is presented in this paper. The algorithm is based on the Bayesian algorithm, and computes a posteriori log-likelihood ratio (LLR) for output bits, using codewords of the MTR code. The log MAP and maxlog MAP version of the algorithm have been developed, showing performance comparable to that of the original version. MAP algorithm offers 2dB coding gain, in combination with LDPC, comparing to the uncoded system, while utilization of the MTR, the 25% decreasing in overall required operations of detector over E2PR4 magnetic recording system.
Keywords :
"Magnetic recording","Iterative decoding","Detectors","Parity check codes","Bayesian methods","Event detection","Iterative algorithms","Partial response channels","Euclidean distance","Error correction codes"
Conference_Titel :
Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009. TELSIKS ´09. 9th International Conference on
Print_ISBN :
978-1-4244-4382-6
DOI :
10.1109/TELSKS.2009.5339507
