Imposing a k constraint in recording systems employing post-Viterbi error correction
- 17 October 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 41 (10) , 2995-2997
- https://doi.org/10.1109/tmag.2005.854448
Abstract
A strategy for imposing a k constraint without any rate penalty is proposed for recording systems that already employ a post-Viterbi error-correction processor. Although the method is general, we focus on the application to perpendicular magnetic recording. This scheme is based on deliberate insertion of a short pattern, which contains one or more transitions and can be detected by an inner error-detection code, in the prolonged absence of magnetic transitions in the data bit pattern. The post-Viterbi processor attempts an error event correction by examining the likelihoods of a list of error events including the one due to the inserted pattern that forces the k constraint. The signal-to-noise ratio loss compared to the ideal system with k=/spl infin/ but perfect timing recovery is negligible at either a fixed bit-error rate or a fixed sector-error rate.Keywords
This publication has 9 references indexed in Scilit:
- Cyclic redundancy check code based high-rate error-detection code for perpendicular recordingIEEE Transactions on Magnetics, 2006
- Detection of prescribed error events: application to perpendicular recordingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A runlength limited low-density parity-check coding schemePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Use of Redundant Bits for Magnetic Recording: Single-Parity Codes and Reed–Solomon Error-Correcting CodeIEEE Transactions on Magnetics, 2004
- Read Channel for Perpendicular Magnetic RecordingIEEE Transactions on Magnetics, 2004
- Generalized partial-response targets for perpendicular recording with jitter noiseIEEE Transactions on Magnetics, 2002
- On the performance of parity codes in magnetic recording systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Noise predictive maximum likelihood detection combined with parity-based post-processingIEEE Transactions on Magnetics, 2001
- A new target response with parity coding for high density magnetic recording channelsIEEE Transactions on Magnetics, 1998