A Simple 2-Head 2-Track Detection Method for Bit-Patterned Magnetic Recording Systems

Koonkarnkhai, Santi; Kovintavewat, Piya

doi:10.1109/iscit.2018.8587990

Cited by 4 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, to subside the ITI embedded in the 2nd readback signal, we subtract the weighted version of the 1st readback signal from the 2nd readback signal. This process is similar to [18], [20],…”

Section: A Soft Iti Suppression Techniquementioning

confidence: 56%

“…where α is a weighting factor. It has been shown in [18] that a good weighting factor can be easily obtained from…”

Section: A Soft Iti Suppression Techniquementioning

confidence: 99%

“…For example, the design of 2D equalizer was proposed by jointly processing based on an array-reader two-track detection system [17], whose performance gain can be achieved over a traditional single-reader single-track detection system. Finally, Koonkarnkhai and Kovintavewat [18] introduced a simple ITI mitigation for a 2-head 2track (2H2T) BPMR channel, where two read heads were employed to read two data tracks and decoded them simultaneously. To subside the ITI, we subtracted the weighted readback signal of the 2nd track (acted as an ITI signal) from the 1st readback signal, and vice versa.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel ITI Suppression Technique for Coded Dual-Track Dual-Head Bit-Patterned Magnetic Recording Systems

2020

Self Cite

View full text Add to dashboard Cite

Generally, an intertrack interference (ITI) is a critical problem in bit-patterned magnetic recording (BPMR) systems that can attain an areal density (AD) up to 4 Tb/in 2. Unavoidably, at high ADs, a very narrow track width must be employed, leading to severe ITI and unacceptable system performance. To tackle the ITI; therefore, this paper introduces a novel ITI suppression technique for coded dual-track dualhead (DTDH) BPMR systems. At the first turbo iteration, the weighted readback signal of the adjacent track served as an estimated ITI signal is utilized for subtracting from the target readback signal to subside the ITI effect, before passing the refined readback signal to a turbo equalizer. Nonetheless, for the second turbo iteration onwards, the estimated ITI signal generated by the soft information obtained from a decoder at each turbo iteration will be then employed to subtract from the target readback signal during the turbo decoding process. Computer simulation results demonstrate that the proposed system can provide better performance than the DTDH system using a hard ITI suppression technique as well as the conventional system using one read head to decode one data track for all ADs, because the proposed technique can estimate the ITI signal well. Furthermore, when considering the recording system under the effects of media noise and track mis-registration, we also found that the proposed system is more robust than other systems. INDEX TERMS Bit-patterned magnetic recording, ITI suppression, soft information, turbo decoding

show abstract

Section: A Soft Iti Suppression Techniquementioning

confidence: 56%

“…where α is a weighting factor. It has been shown in [18] that a good weighting factor can be easily obtained from…”

Section: A Soft Iti Suppression Techniquementioning

confidence: 99%