Title :
Applications of low-density parity-check codes to magnetic recording channels
Author :
Song, Hongxin ; Todd, Richard M. ; Cruz, J.R.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oklahoma Univ., Norman, OK, USA
fDate :
5/1/2001 12:00:00 AM
Abstract :
We consider the use of high-rate low-density parity-check (LDPC) codes for magnetic recording. We design and evaluate the performance of a magnetic recording system, which uses an LDPC code as the error-correcting code, in conjunction with a rate 16/17 quasimaximum-transition-run (QMTR) channel code on a modified E2 PR4 (ME2PR4)-equalized channel. Iterative decoding between the partial response channel and the LDPC code is performed. Simulations show that an additional four-dB gain over the QMTR code can be obtained by the LDPC code. The algorithms used to design this LDPC code are also discussed
Keywords :
block codes; channel coding; digital magnetic recording; equalisers; error correction codes; error statistics; iterative decoding; linear codes; partial response channels; BER; LDPC code; Lorentzian channel; ME2PR4-equalized channel; QMTR code; algorithms; bit-error rate; error-correcting code; high-rate parity-check codes; iterative decoding; linear block code; low-density parity-check codes; magnetic recording channels; magnetic recording system; modified E2PR4-equalized channel; partial response channel; performance evaluation; quasimaximum-transition-run channel code; simulations; turbo code; Bit error rate; Convolutional codes; Error correction codes; Iterative algorithms; Iterative decoding; Magnetic recording; Parity check codes; Partial response channels; Performance gain; Turbo codes;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
