Reduced-Nonlinear Effect on Magnetic Recording Channels Using MMSE Equalizers
Article Sidebar
Main Article Content
Abstract
This paper considers the nonlinear effect on magnetic recording channels in order to reduce the system distortion. In this work, we propose the designed MMSE equalizer and target for a high density perpendicular magnetic recording to combat the nonlinear transition shift (NLTS) in a channel characterized by jitter noise and additive white Gaussian noise (AWGN). Due to a complex nature of nonlinear effects, the nonlinearity of a read-back signal is designed by the second order Volterra model consisting of linear and nonlinear part. The bit-error rate (BER) of the nonlinear-affected system using the designed MMSE equalizer is significantly decreased. The results show that the proposed minimum mean square error (MMSE) equalizer with constraint can decrease the inter-symbol interference (ISI) that causes nonlinearity and also improve performance.
Article Details
This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.
- Creative Commons Copyright License
The journal allows readers to download and share all published articles as long as they properly cite such articles; however, they cannot change them or use them commercially. This is classified as CC BY-NC-ND for the creative commons license.
- Retention of Copyright and Publishing Rights
The journal allows the authors of the published articles to hold copyrights and publishing rights without restrictions.
References
[2] M. Schetzen, The Volterra and Wiener Theories of Nonlinear System, Wiley, 1980
[3] R. Hermann, "Volterra modeling of digital magnetic saturation recording channels," IEEE Tran. Magn., vol. 26, no. 5, pp. 2125-2127, Sept. 1990.
[4] B. Vasic and E. M. Kurtas, Coding and Signal Processing for Magnetic Recording System, CRC PRESS, 2004.
[5] V. Braun, "Dipulse-Response measurement of a magnetic recording channel using golay complementary sequences," IEEE Tran. Magn., vol. 34, no. 1, pp. 309-316, Jan. 1998.
[6] P. Kovintavewat, I. Ozgunes, E. Kurtas, J.R. Barry, and S. W. McLaughlin, "Generalized partial-response targets for perpendicular recording with jitter noise," IEEE Tran. Magn., vol.38, no.5, pp. 2340-2342, Sept. 2002.
[7] T. R. Oenning, and J. Moon, "The effect of jitter noise on binary input intersymbol interference channel capacity," in Proc. IEEE Int. Conf. Commun., vol. 8, 2001, pp. 2416-2420.
[8] R. Wood, "Jitter vs. Additive noise in magnetic recording: effects on detection," IEEE Tran. Magn., vol. 23, no. 5, pp. 2683-2685, Sept. 1987.
[9] W.R. Eppler, and I. Ozgunes, "Channel characterization method using dipulse extraction," IEEE Tran. Magn., vol. 42, no. 2, Feb. 2006, pp. 176-181.
[10] S. Nabavi, and B. V. K. Vijaya Kumar, "Two-Dimensional generalized partial response equalizer for Bit-Patterned media," in Proc. IEEE Int. Conf. Commun., 2007, pp. 6249-6254.
[11] A. Sirirungsakulwong, N. Puttarak, and P. Supnithi, "Designed MMSE equalizers for nonlinear magnetic recording channels," in Proc. the 11th Int. Conf. Electrical Eng./Electronics, Comp., Telecomm. Info. Tech., 2014, pp. 1-5.