2021
DOI: 10.1063/9.0000124
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A simple skew angle detection and suppression method for bit-patterned magnetic recording

Abstract: An achievement of an areal density (AD) up to 4 Tb/in2 in hard disk drives (HDDs) is expected under a bit-patterned magnetic recording (BPMR) system. One of major problems in HDDs is a skew angle (SA), which depends on a read/write head position on a disk platter. Practically, if precaution is not taken, the SA can easily deteriorate the overall system performance. To maintain an acceptable system performance; therefore, we present a simple SA detection and suppression method for BPMR systems. Here, one readba… Show more

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Cited by 5 publications
(5 citation statements)
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“…3 but we assume that the SA amount is known; • "Proposed system with SA" is the system in Fig. 3 without the MLP-based SA estimator; • "Conventional system" is the system in [17] that employs one read head, a 1D equalizer, and a 2D Viterbi detector to decode one data track; and • "Conventional system with SA" is the system in [17] without the SA estimator. It is apparent that "Proposed system" performs the best, followed by "Proposed with SA," "Conventional system," and "Conventional system with SA," respectively.…”
Section: Simulation Resultsmentioning
confidence: 99%
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“…3 but we assume that the SA amount is known; • "Proposed system with SA" is the system in Fig. 3 without the MLP-based SA estimator; • "Conventional system" is the system in [17] that employs one read head, a 1D equalizer, and a 2D Viterbi detector to decode one data track; and • "Conventional system with SA" is the system in [17] without the SA estimator. It is apparent that "Proposed system" performs the best, followed by "Proposed with SA," "Conventional system," and "Conventional system with SA," respectively.…”
Section: Simulation Resultsmentioning
confidence: 99%
“…In addition, we found that "Proposed system" operating at high SAs can perform better than that operating at low SAs. This might be because a high SA helps reduce the ITI effect in a BPMR system [17], as shown in the ITI coefficients of the 2D channel matrix in ( 9) and (10). Nonetheless, without the SA mitigation method, both proposed and conventional systems perform unreliably, especially at high SAs, as illustrated in the Fig.…”
Section: Simulation Resultsmentioning
confidence: 99%
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