Twin Iterative Detection for Bit-Patterned Media Recording Systems

• Published in: IEEE transactions on magnetics Vol. 53; no. 11; pp. 1 - 4
• Main Authors: Nguyen, Chi Dinh, Lee, Jaejin
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-11-2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bit-patterned media recording; Decoders; Decoding; Detectors; Disk drives; Equalizers; Interference; intertrack interference; Iterative decoding; iterative detection; Iterative methods; Magnetic recording; Magnetism; Media; Recording; Signal processing; soft output Viterbi algorithm; Tunneling magnetoresistance; Two dimensional models
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2017.2700290

Bit-patterned media recording (BPMR) has been developed into a technology for the next generation of hard disc drives, which can push area density beyond 1 Tb/in 2 for satisfying the ever increasing demand of storing massive amounts of data. One of the major challenges in BPMR systems is 2-D interference that is regarded as a gist of degrading the system performance. From a signal processing viewpoint, 2-D optimal detection schemes are very complicated for 2-D interference channels. In this paper, we propose a twin iterative detection scheme based on 1-D detectors and decoders in order to reduce the complexity. The performance of the proposed scheme is compared to that of a conventional simplified 2-D iterative detection scheme, and the results indicate that the proposed model is better by approximately 1 dB under the effect of 10% track misregistration.