Nonlinear Performance Study of Dual FDTS/DF Detector for Magnetic Recording Channels

Ming JIN  Behrouz FARHANG-BOROUJENY  Kalahasthi C. INDUKUMAR  George MATHEW  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.9   pp.1176-1181
Publication Date: 2001/09/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Selected Papers from the 5th Asian Symposium on Information Storage Technology)
Category: 
Keyword: 
non-linear transition shift,  partial erasure,  dual FDTS,  magnetic recording,  

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Summary: 
Dual FDTS/DF detector is an advanced version of FDTS/DF detector that gives significant performance improvement over FDTS/DF scheme on linear channels, and moreover, in contrast to other dual-detector schemes, it is suitable for various d-constraint coded channels. As recording density increases, channel nonlinearities such as non-linear transition shift (NLTS) and partial erasure (PE) degrade the performance of detectors. In this paper, we use nonlinear channel models to study the BER performance of dual FDTS/DF detector and compare the performances with those of other detectors through bit-by-bit simulations. Simulation results show that the dual FDTS/DF detector is superior in performance compared to FDTS/DF and MDFE detectors even on nonlinear channels, and it gives comparable BER performance with M2DFE (adv.) on nonlinear channels. Results also indicate that the detectors on the d=1 coded channels are more robust to channel nonlinearities compared to those of other detectors (such as PRML family detectors) on the d=0 coded channels.