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Performance comparison of various PRML systems for (1,7)RLL code and 8/9 code

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1997年第11期80卷 39-47页

作者： Osawa, H Okada, M Okamoto, Y Saito, H Ehime Univ Fac Engn Matsuyama Ehime 790 Japan

The performance of various PRML systems for (1,7)RLL code and 8/9 code is compared. First, the bit error rates are obtained by simulation for PR4ML, EPR4ML, PR(1,1,0,-1,-1)ML, and PR(1,2,1,0,-1,-2,-1)ML systems. Next, the relationships between the required SNR at the reading point to attain a prescribed error rate and the normalized linear density are derived and compared. Further, the performance of the FS-PRML system which can reduce the number of states of the Viterbi decoder for (1,7)RLL code to one half is compared. It is shown that the PR(1,2,1,0,-1,-2,-1)ML system and FS-PR(1,1,0,-1,-1)ML system for (1,7)RLL code exhibit excellent performance. (C) 1998 Scripta Technica.

关键词： digital magnetic recording PRML system (1,7)RLL code 8/9 code

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Performance comparisons of various PRML systems for rate 11/12 punctured convolutional code and 8/9 code

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1999年第5期82卷 54-62页

作者： Saito, H Furukawa, E Okamoto, Y Osawa, H Ehime Univ Fac Engn Matsuyama Ehime 7908577 Japan

Partial response signaling with maximum likelihood detection (PRML) systems using a rate 11/12 punctured convolution code (PCC) as a recording code in digital magnetic recording are proposed. The bit error rate (BER) performance for several PRML systems for the rate 11/12PCC is obtained by computer simulation and compared with that for the conventional rate 8/9 code. It is shown that among these PRML systems, E(2)PR4ML systems for the rate 11/12PCC outperform those for the rate 8/9 code and provide an SNR advantage of about 3.4 dB at a BER of 10(-4) and a normalized linear density of 3. (C) 1999 Scripta Technica, Electron Comm Jpn Pt 2, 82(5): 54-62, 1999.

关键词： digital magnetic recording PRML system punctured convolutional code 8/9 code

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Performance comparison of various PRML systems for (1,7)RLL code and 8/9 code

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Electronics and Communications in Japan (Part II: Electronics) 1998年第11期80卷

作者： Hisashi Osawa Makoto Okada Yoshihiro Okamoto Hidetoshi Saito Faculty of Engineering Ehime University Matsuyama Japan 790

The performance of various PRML systems for (1,7)RLL code and 8/9 code is compared. First, the bit error rates are obtained by simulation for PR4ML, EPR4ML, PR(1,1,0,−1,−1)ML, and PR(1,2,1,0,−1,−2,−1)ML systems. Next, the relationships between the required SNR at the reading point to attain a prescribed error rate and the normalized linear density are derived and compared. Further, the performance of the FS-PRML system which can reduce the number of states of the Viterbi decoder for (1,7)RLL code to one half is compared. It is shown that the PR(1,2,1,0,−1,−2,−1)ML system and FS-PR(1,1,0,−1,−1)ML system for (1,7)RLL code exhibit excellent performance. © 1998 Scripta Technica. Electron Comm Jpn Pt 2, 80(11): 39–47, 1997

关键词： digital magnetic recording PRML system (1,7)RLL code 8/9 code

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