About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
IEEE Transactions on Magnetics
Paper
Performance and Sensitivity Analysis of Maximum-Likelihood Sequence Detection on Magnetic Recording Channels
Abstract
The results of a study comparing the performance of maximum-likelihood sequence detection (MLSD) for various magnetic-recording schemes are presented. The schemes considered are: Run-length limited (RLL) coding, non-return to zero (NRZ) recording and partial-response class IV (PR-IV) and extended partial-response class IV (EPR-IV) signaling. MLSD of RLL-coded and NRZ recording systems provides bounds on the performance that can be achieved, respectively, by peak detection systems and by partial-response schemes more complex than PR-IV and EPR-IV. Performance of PR-IV and EPR-IV signaling with MLSD is compared with the obtained bounds: The gain in, recording density over peak detection provided by these partial-response schemes is established, and the merit of using more complex partial-response systems is determined. Sensitivity of the PR-IV and EPR-IV systems to various parameters is examined. © 1989 IEEE