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21. B. Marcus, P. Siegel, and J. K. Wolf, “Finite-state modulation codes for data storage,” IEEE J. Select.<br />

Areas Commun., vol. 10, no. 1, pp. 5–37, Jan. 1992.<br />

22. B. H. Marcus, “Sofic systems and encoding data,” IEEE Trans. Inform. Theory, vol. IT-31, pp. 366–377,<br />

May 1985.<br />

23. C. Monti, and G. Pierobon, “Codes with multiple spectral null at zero frequency,” IEEE Trans. Inform.<br />

Theory, vol. 35, no. 2, pp. 463–472, March 1989.<br />

24. A. Patapoutian, “Optimal burst frequency derivation for head positioning,” IEEE Trans. Magn., vol. 32,<br />

no. 5, pt. 1, pp. 3899–3901, Sept. 1996.<br />

25. A. Patapoutian, “Signal space analysis of head positioning formats,” IEEE Trans. Magn., vol. 33, no.3,<br />

pp. 2412–2418, May 1997.<br />

26. A. Patapoutian, “Analog-to-digital converter algorithms for position error signal estimators,” IEEE<br />

Trans. Magn., vol. 36, no. 1, pt. 2, pp. 345–400, Jan. 2000.<br />

27. D. E. Reed, W. G. Bliss, L. Du, and M. Karsanbhai, “Digital servo demodulation in a digital read<br />

channel,” IEEE Trans. Magn., vol. 34, pp. 13–16, Jan. 1998.<br />

28. I. S. Reed and G. Solomon, “Polynomial codes over certain finite fields,” J. Soc. Indust. Appl. Math.,<br />

vol. 8, pp. 300–304, 1960.<br />

29. C. M. Riggle and S. G. McCarthy, “Design of error correction systems for disk drives,” IEEE Trans.<br />

Magn., vol. 34 , 4 pt. 2, pp. 2362–2371, July 1998.<br />

30. A. H. Sacks, “Position signal generation in magnetic disk drives,” Ph.D. dissertation, Carnegie-Mellon<br />

University, Pittsburgh, PA, 1995.<br />

31. A. H. Sacks, M. Bodson, and W. Messner, “Advanced methods for repeatable runout compensation<br />

[disc drives],” IEEE Trans. Magn., vol. 31, no. 2 , pp. 1031–1036, March 1995.<br />

32. Y. Tang and C. Tsang, “A technique for measuring nonlinear bit shift,” vol. 27, no. 6, pp. 5326–5318,<br />

Nov. 1991.<br />

33. Y. Tang, R. L. Galbraith, J. D. Coker, P. C. Arnett, and R. W. Wood, “Precompesation value determination<br />

in a PRML channel,” IEEE Trans. Magn., vol. 32, no. 3, pp. 2013–1014, May 1996.<br />

34. G. T. Tuttle et al., “A 130 Mb/s PRML read/write channel with digital-servo detection,” in Proc. IEEE<br />

Int. Solid State Circuits Conf. 96, San Francisco, CA, Feb. 8–10, 1996, pp. 64–65.<br />

35. J. L. Sonntag and B. Vasic, “Implementation and bench characterization of a read channel with parity<br />

check post processor,” TMRC 2000, Santa Clara, CA, Aug. 2000.<br />

36. S. B. Wicker, Error Control Systems for Digital Communication and Storage. Englewood Cliffs, NJ:<br />

Prentice-Hall, 1995.<br />

37. D. L. Whiting, “Bit-serial Reed–Solomon decoders in VLSI,” Ph.D. dissertation, California Inst. Tech.,<br />

Pasadena, 1984.<br />

34.3 Adaptive Equalization and Timing Recovery<br />

Pervez M. Aziz<br />

Adaptive signal processing plays a crucial role in storage systems. Proper detection of the readback signal<br />

by a Viterbi detector assumes that the signal has the right gain, is equalized to the partial response, and<br />

is sampled at the proper sampling instances. In this section, the focus is mainly on equalization and<br />

timing recovery. Some of the basic algorithms employed in equalization and timing recovery are reviewed.<br />

Various architectures and algorithms are presented, which have been used in state-of-the-art read channels.<br />

Finally, comparative performance data for some of these architectures are presented.<br />

Adaptive Equalization<br />

What is equalization? It is the act of shaping the read back magnetic recording signal to look like a<br />

target signal specified by the partial response (PR). The equalized signal is made to look like the target<br />

signal in both the time and frequency domain. In this subsection, various equalization architectures and<br />

© 2002 by CRC Press LLC

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