A rate 8/9 sliding block trellis code with stationary detector for magnetic recording

Nikolić, Borivoje; Leung, Mkh; Fu, L.

doi:10.1109/icc.1999.765515

Cited by 3 publications

(1 citation statement)

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“…Information about the remapping is encoded in the adjacent odd codeword, as illustrated in Fig. 1 [15]. Practical error propagation is limited to two bytes.…”

Section: Trellis Reduction By Coding Constraints and Rate 8/9 Tmmentioning

confidence: 99%

Reduced complexity sequence detection for high-order partial response channels

Leung

Nikolić²,

Fu³

et al. 2001

IEEE J. Select. Areas Commun.

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Abstract-Detector hardware complexity of high-order partial response magnetic read channels is a major obstacle to high data rate operation and reduced area and power consumption. The method presented here reduces the complexity of single-step and two-step implementations of the Viterbi detector by applying a distance-enhancing code that eliminates some states from the code trellis. The complexity of the detector is further reduced by eliminating less-probable branches from the trellis. This is accomplished by a simple control mechanism that uses the signs of the consecutive input samples. The reduced set of add-compare-select (ACS) units is dynamically assigned to the detector states, decreasing the complexity of the Viterbi detector by roughly 50%. This method is demonstrated on high-order partial response systems with the E 2 PR4 target and an 11-level/32-state target. The simulation results show negligible bit error rate (BER) degradation for signal-to-noise ratios in the range of operation of contemporary disk drive read channels.

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“…Information about the remapping is encoded in the adjacent odd codeword, as illustrated in Fig. 1 [15]. Practical error propagation is limited to two bytes.…”

Section: Trellis Reduction By Coding Constraints and Rate 8/9 Tmmentioning

confidence: 99%