Viterbi detection analysis on RLL encoded sequences magnetic recording applications

摘要

This paper presents partial response equalization and detection methods, based on maximum likelihood (PRML), with the purpose of analyzing the detection process of the sequence coding function in a recording magnetic channel. A channel simulator tests equalization, detection and decoding alternatives, under channel and noise characteristic variations. The paper presents a Viterbi detector and compares its bit error rate-BER performance using random or run length limited (RLL) encoded data sequences, with the already existing solutions.