Equalization and detection in storage channels

IEEE Transactions on Magnetics

Volumn 32, Issue 5 PART 3, 1996, Pages 5206-5217

  Nair, Sapthotharan K ^a   Shafiee, Hamid ^b   Moon, Jaekyun ^a,c  

^a IBM ALMADEN RESEARCH CENTER   (United States)

^b Texas Instruments ^*

^c UNIVERSITY OF MINNESOTA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BIT ERROR RATE; COMPUTER SIMULATION; CORRELATION DETECTORS; DIGITAL SIGNAL PROCESSING; EQUALIZERS; MAGNETIC HEADS; MAGNETIC RECORDING; MAGNETIC THIN FILM DEVICES; MAGNETORESISTANCE; MATHEMATICAL MODELS; SIGNAL DETECTION; SPURIOUS SIGNAL NOISE;

DECISION FEEDBACK EQUALIZER; DIGITAL MAGNETIC RECORDING; FIXED DELAY TREE SEARCH WITH DECISION FEEDBACK DETECTOR; MAGNETORESISTIVE READ HEAD; MAXIMUM LIKELIHOOD DETECTORS; STORAGE CHANNELS;

MAGNETIC DISK STORAGE;

EID: 0030246425     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/20.538623     Document Type: Article

References (45)

1. T. D. Howell, D. P. McCown, T. A. Diola, Y. S. Tang, K. R. Hense, and R. L. Gee, "Error rate performance of experimental gigabit per square inch receding components," IEEE Trans. Magn., vol. 26, pp. 2298-2302, Sept. 1990.
2. G. Kerwin, R. Galbraith, and J. Coker, "Performance evaluation of the disk drive industry's second-generation PRML data channel." IEEE Trans. Magn., vol. 29, Sept. 1993.
3. R. D. Cideciyan, F. Dolivo, R. Hermann, W. Hirt, and W. Schott, "A PRML system for digital magnetic recording," J. Select. Areas. Commun., vol. 10, pp. 38-56, Jan. 1992.
4. G. Jacoby, "A new look-ahead code for increased data density," IEEE Trans. Magn., vol. MAG-13, pp. 1202-1204, Sept. 1977.
5. R. W. Wood and D. A. Peterson, "Viterbi detection of class IV partial response on a magnetic recording channel," IEEE Trans. Commun., vol. COM-34, pp. 454-461, May 1986.
6. H. K. Thapar and A. M. Patel, "A class of partial response systems for increasing storage density in magnetic recording," IEEE Trans. Magn., vol. MAG-23, pp. 3666-3668, Sept. 1987.
7. G. D. Forney, Jr., "The Viterbi algorithm," Proc. IEEE. vol. 61, pp. 268-278, Mar. 1973.
8. _. "Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference," IEEE Trans. Inform. Theory, vol. IT-18, pp. 363-378, May 1972.
9. J. W. M. Bergmans, "Density improvements in digital magnetic recording by decision feedback equalization," IEEE Trans. Magn., vol. MAG-22, pp. 157-162, May 1986.
10. J. Moon and L. R. Carley, "Performance comparison of detection methods in magnetic recording," IEEE Tram,. Magn., vol. 26, pp. 3155-3172, Nov. 1990.
11. H. K. Thapar, N. P. Sands, W. L. Abbott, and J. M. Cioffi, "Spectral shaping for peak detection equalization," IEEE Trans. Magn., vol. 26, pp. 2309-2311, Sept. 1990.
12. P. H. Siegel and J. K. Wolf, "Modulalion and coding for information storage," IEEE Commun. Mag., pp. 68-86, Dec. 1991.
13. E. A. Lee and D. G. Messerschmitt, Digital Communications. Norwell, MA: Kluwer Academic, 1988.
14. J. Moon, "Discrete-lime modeling of transition noise dominant channels and study of detection performance," IEEE Trans. Magn., vol. 27, pp. 4573-4578, Nov. 1991.
15. W. L. Abbott, J. M. Cioffi, and H. K. Thapar, "Performance of digital magnetic recording with equalization and offtrack interference," IEEE Trans. Magn., vol. 27, pp. 705-716, Jan. 1991.
16. S. Haykin, Adaptive Filter Theory. Englewood Cliffs, NJ: Prentice-Hall, 1991.
17. C. M. Melas, P. Arnett, I. Beardsley, and D. Palmer, "Nonlinear superposition in saturation recording of disk media," IEEE Trans. Magn., vol. MAG-23, pp. 2079-2081, Sept. 1987.
18. [18) X. Che, M. K. Bhattacharyya, and H. N. Bertram, "Studies of nonlinear bit shift and partial erasure using pseudo-random sequence," IEEE Trans. Magn., vol. 29, pp. 2972-2974, 1993.
19. J. Moon and J. G. Zhu, "Nonlinearities in thin-film media and their impact on data recovery," IEEE Trans. Magn., vol. 29, Jan. 1993.
20. Y. S. Tang and C. Tsang, "Nonlinear transition shifts in magnetic recording due to interpattern proximity effects," J. Appl. Phys., vol. 74, pp. 3546-3550.
21. T Yamauchi and J. M. Cioffi, "A nonlinear model for thin film disk recording systems." IEEE Trans. Magn., vol. 29, pp. 3993-3995, 1993.
22. J. Moon and L. R. Carley, Sequence Detection for High-Density Storage Channels. Norwell, MA: Kluwer Academic, 1992.
23. A. M. Patel, R. Rutledge, and B. So, "Six-sample look-ahead (1, 7) ML detection channel and performance data," IEEE Trans. Magn., vol. 29, Sept. 1993.
24. J. G. Kenney and L. R. Carley, "Geometric representation of the tree-search detector," in Proc. IEEE Int. Conf. Commun., Chicago, IL, June 1992.
25. _, "Multi-level decision feedback equalization for saturation recording," IEEE Trans. Magn., vol. 29, pp. 2160-2171, July 1993.
26. 5218-5225 Combined Partial Response Decision Feedback Equalization and Coding for the Lorentzian Channel Marc P.C. Fossorier and James T. Aslanis The authors are with the Department of Electrical Engineering, University of Hawaii, Honolulu, HI 96822 USA. This paper considers a combined coding and equalization technique applied to the magnetic recording channel. The optimization of the coded-equalization scheme for this channel requires balancing the coding rate with its associated distance gain and equalization loss. A major concern in a coded-equalization scheme using decision feedback equalization (DFE) is error propagation. A new indicator to measure the effect of error propagation when using soft decision decoding is proposed. For medium to high normalized recording densities (S > 1.5), it is shown that error propagation significantly degrades the theoretical performance of a detection scheme which combines a partial response DFE and simple trellis codes. In fact, this combined system performs worse than the uncoded one. The addition of delayed decision feedback sequence estimation (DDFSE) to limit the effect of error propagation is then investigated. With a moderate decoding complexity, positive coding gains have been achieved at such densities when choosing the partial response polynomial according to the derived indicator. © 1996 IEEE Publisher Item Identifier S 0018-9464(96)0500-5.
27. J. M. Cioffi, W. L. Abbott, H. K. Thapar, C. M. Melas, and K. D. Fisher, "Adaptive equalization in magnetic-disk storage channels," IEEE Commun. Magn., pp. 14-29, Feb. 1990.
28. H. K. Thapar and A. M. Patel, "A class of partial response systems for increasing storage density in magnetic recording," IEEE Trans. Magn., vol. MAG-23, pp. 3666-3668, Sept. 1987.
29. D. J. Tyner and J. G. Proakis, "Partial response equalizer performance in digital magnetic recording channels," IEEE Trans. Magn., vol. 29. pp. 4194-4208, Nov. 1993.
30. K. A. Schouhamer Immink, "Coding techniques for the noisy magnetic recording channel: A state of the art report," IEEE Trans. Commun., vol. 37, pp. 413-419, May 1989.
31. W. L. Abbott and J. M. Cioffi, "Combined equalization and coding for high density saturation recording channels," IEEE J. Select. Areas Commun., vol. 10, pp. 168-181, Jan. 1992.
32. J. W. M. Bergmans. "Partial response equalization." Philips J. Res., vol. PJR-42, pp. 209-245, 1987.
33. J. M. Cioffi, G. P. Dudevoir, M. V. Eyuboglu, and G. D. Forney, Jr., "MMSE decision feedback equalizers and coiling - Pan I: Equalization results," IEEE Trans. Commun., vol. 43, pp. 2582-2594, Oct. 1995.
34. G. D. Forney, Jr., "Maximum likelihood sequence estimation of digital sequences in the presence of intersymbol interference," IEEE Trans. Inform. Theory, vol. IT-18, pp. 363-378, May 1972.
35. J. Moon and J. G. Zhu, "Non linearities in thin-film media and their impact on data recovery," IEEE Trans. Magn., vol. 29, pp. 177-182, Jan. 1993.
36. D. L. Duttweiler, J. E. Mazo, and D. G. Messerschmitt, "An upper bound on the error probability in decision-feedback equalization," IEEE Trans. Inform. Theory, vol. IT-20, pp. 490-497, July 1974.
37. W. U. Lee and F. S. Hill, Jr., "A maximum-likelihood sequence estimator with decision-feedback equalization," IEEE Trans. Commun., vol. COM-25, pp. 971-979, Sept. 1977.
38. R. W. Lucky, J. Salz, and E. J. Weldon, Jr., Principles of Data Communication. New York: McGraw-Hill, 1968.
39. M. P. C. Fossorier, "Performance evaluation of decision feedback equalization for the Lorentzian channel," IEEE Trans. Magn., vol. 32, Mar. 1996.
40. J. K. Wolf and G. Ungerboeck, "Trellis coding for partial response channels," IEEE Trans. Commun., vol. COM-34, pp. 765-773, Aug. 1986.
41. S. Lin and D. J. Costello, Jr., Error Control Coding Fundamentals and Applications. Englewood Cliffs, NJ: Prentice-Hall, 1983.
42. E. Zehavi and J. K. Wolf, "On saving decoder states for some trellis codes and partial response channels," IEEE Trans. Commun., vol. 36, pp. 222-224, Feb. 1988.
43. A. Duel-Hallen and C. Heegard, "Delayed decision-feedback sequence estimation," IEEE Trans. Commun., vol. 37, pp. 428-436, May 1989.
44. F. R. Magee, Jr. and J. G. Proakis, "Adaptive maximum-likelihood sequence estimation for digital signaling in the presence of intersymbol interference," IEEE Trans. Inform. Theory, vol. IT-19, pp. 120-124, Jan. 1973.
45. J. W. M. Bergmans. "On the use of decision feedback for simplifying the Viterbi detector," Philips J. Res., vol. PJR-42, pp. 399-428, 1987.