Rate 16/17 maximum transition run (3;11) code on an EEPRML channel with an error-correcting postprocessor

Nishiya, Takushi; Tsukano, Kyoko; Hirai, T.; Mita, Seiichi; Nara, T.

doi:10.1109/20.799089

Cited by 24 publications

(12 citation statements)

References 8 publications

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“…The symbols , , , , and show the performance for the case where for E PR4 system, [8], , [9], and [10] are adopted for the ME PR4 system. The dotted lines show the performance with no iteration and the solid lines show performance for iteration #5.…”

Section: Ber Performance Of Iterative Decodingmentioning

confidence: 99%

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Bit error rate performance of iterative decoding in a perpendicular magnetic recording channel

et al. 2001

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The BER performance of iterative decoding systems and PRML systems in a perpendicular magnetic recording channel is experimentally investigated. A performance evaluation system consisting of a spinstand, a recording waveform generator, a digital storage oscilloscope and a personal computer was used. PR1ML, PR2ML, EPR3ML, E 2 PR3ML and ME 2 PR4ML systems are discussed as a PRML channel. The 8/9 and 16/17 iterative-decoding systems consists of the encoder, with RSC encoder serially concatenated with precoded PR channels and the iterative decoder with APP modules using Max-log-MAP algorithm.The results show that EPR3ML and E 2 PR3ML provide good BER performance in a perpendicular magnetic recording channel and that the iterative decoding system is also an efficient way to improve the BER performance in the channel.

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Section: Ber Performance Of Iterative Decodingmentioning

confidence: 99%

“…We assume three types of PR channels. They are PR channels with only positive coefficients, such as PR1 and PR2 channels [6], DC-free PR channels, such as ME PR4 channel [7]- [10], and a DC unbalanced PR channel, such as a PR3 channel [6]. The Fig.…”

Section: R/w Characteristics Of Perpendicular Recording Channelmentioning

confidence: 99%

Bit error rate performance of iterative decoding in a perpendicular magnetic recording channel

et al. 2001

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“…To avoid code-rate loss in the TMTR code, a rate 16/17 quasi-MTR (QMTR) code was reported in [19]. The code eliminates quadbits but leaves all tribits, which results in a higher code rate.…”

Section: B Time-varying Maximum Transition Runlength (Tmtr) Codes Anmentioning

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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“…The Boolean functional equations for the MTR 4/5 (2, 4) and MTR 6/7 encoder/decoder are given in [5]. Based on them, a practical implementation was possible by extending the simulator presented in [6] and [7]. The MTR codes offer redundancies of 25% and 12.5%, compared with 50% and 100%, which were characteristic to the RLL codes already implemented in the simulator.…”

Section: General Prnciples Of Mtr-rll Codesmentioning

confidence: 99%

“…For the proposed rate 16/17 MTR code, it is 11. A detailed description of the encoding algorithm with codeword tables is available in [6]. When error events are detected in the output of the Viterbi detector, if the correction does not violate the rate 16/17 MTR constraint (more than quad-bits and longer runs of "1" are forbidden), then the errors are corrected.…”

Section: Mtr-rll 16/17 With Turbo Eeprml Recording Channelmentioning

confidence: 99%

Performance and coding gains of MTR-RLL codes in partial response magnetic channels

Putinica

Stancescu

MELECON 2006 - 2006 IEEE Mediterranean Electrotechnical Conference

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Partial Response Maximum Likelihood (PRML, [1]) magnetic channels offer optimum Bit Error Rate (BER) performances inside certain ranges of recording densities and SNR values. In order to extend these performances outside those ranges, supplementary processing of detected sequences is required or channel coding techniques that limit the effect of intersymbol interference (ISI) by separating magnetic transitions. In many cases though, this leads to loss of disk space due to the redundancy inherent to channel codes. This redundancy can be significantly reduced if classic Run Length Limited -RLL (d, k) codes are replaced with Maximum Transition Run -MTR-RLL codes.

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Rate 16/17 maximum transition run (3;11) code on an EEPRML channel with an error-correcting postprocessor

Cited by 24 publications

References 8 publications

Bit error rate performance of iterative decoding in a perpendicular magnetic recording channel

Bit error rate performance of iterative decoding in a perpendicular magnetic recording channel

Reduced complexity sequence detection for high-order partial response channels

Performance and coding gains of MTR-RLL codes in partial response magnetic channels

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