FIR Filter for Adaptive Equalization in PRML Read Channels

摘要

A novel design of FIR filter for adaptive equalization in PRML read channels is presented. Two aspects of a design are considered: architecture level and implementation. The realization of this FIR structure introduces new architectural solutions. Those solutions are exploiting beneficial properties of both conventional FIR architectures, which allows for low computation latency at high operating frequencies, and ease of trading between parallel and pipelined structure. The implementation of this FIR structure uses the channel noise property knowledge to determine acceptable level of truncation/rounding and applies optimal automated special-purpose multiplication method to further minimize overall latency of the filter.