Error rate analysis of partial response channels in the presence of texture noise

A model for error rate analysis including the effect of texture noise is de scribed, The impact of long-range correlated and nonstationary texture nois e on system performance is examined for various types of partial response ( PR4 and EPR4) channels and replay heads [magnetoresistive and giant magneto resistive (GMR)], A higher-order partial response polynomial (EPR4) is foun d to have better tolerance to disk substrate texture, It is also found that the recording medium noise dominates the error rate of systems using GMR h eads for a typical recording system. The evaluations of the signal, noise, and the consequential probability of error for a PR4 system are illustrated in detail.