TIMING SENSITIVITY IN DISCRETE-TIME EQUALIZATION

In digital channels, pulse shaping is achieved by passing readback sam ples through a discrete-time filter called the equalizer, which is typ ically implemented using a finite impulse response (FIR) filter consis ting of taps and delays. Under the finite-complexity constraint, the e qualizer performance is a highly sensitive function of timing phase. I n this paper, we investigate the performance of different equalization schemes suitable for high density magnetic recording - partial respon se linear equalization and feedback equalization - as a function of st atic sampling phase and of equalizer complexity.