Evaluation of detection algorithms for perpendicular recording channels with intertrack interference

Tan, Weijun; Cruz, J.R.

doi:10.1016/j.jmmm.2004.10.066

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…In the proposed A-IMD scheme, we use the symbol-based BCJR algorithm for channel detection [8]. Due to the symmetry of the channel response matrix, the number of states and the number of input symbols of the channel detection trellis is greatly reduced in [2], [13]. Suppose x k+1,1 , x k+1,2 and x k+1,3 are the three binary inputs for channel detection trellis.…”

Section: Reduced-bcjr Detectionmentioning

confidence: 99%

Asymmetric Iterative Multi-Track Detection for 2-D Non-Binary LDPC-Coded Magnetic Recording

et al. 2013

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The inter-track interference (ITI) is a major impairment for the next-generation magnetic recording systems.The single-track read channel model, combined with anti-ITI signal detection schemes, is a general way to recover single-track data from a readback signal corrupted by the ITI. In contrast to the general way, the multi-track read channel model can be used to simultaneously recover multi-track data from a readback signal and we do need not to mitigate the ITI. However, the performance of the multi-track detection is severely degraded by the weak signals from the sidetracks and the indistinguishable symbols. In this paper, to improve this performance, we propose an asymmetric iterative multi-track detection (A-IMD) scheme, which uses two parallel jointed six-symbol-based detectors concatenated with two parallel non-binary low-density parity-check (NB-LDPC) decoder over GF(4) to iteratively recover four tracks' data from the two channel readback signals. Simulation results demonstrate that the performance of the multi-track detection can be greatly improved by using the proposed A-IMD scheme.

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Section: Reduced-bcjr Detectionmentioning

confidence: 99%