Decoder Algorithm for Class IV Partial Response Magnetic Recording System With Nonlinear Distortion
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
A decoding algorithm for class IV partial response magnetic recording systems with nonlinear distortion is provided. The decoding algorithm first samples the output of the channel at twice the rate of a Partial Response Maximum Likelihood decoder and utilizes a standard Viterbi algorithm to estimate the data sequence. The data sequence estimate is used to estimate the jitter. The jitter estimate is then subtracted from the sampled values, and another standard Viterbi algorithm is utilized on the difference to obtain a final estimate of the data sequence.