Method and apparatus for signal detection in an extended partial response (EPR) IV communication path or storage device

摘要

The present invention relates to a method and apparatus for signal detection in an extended partial rate (EPR) IV communication path or storage device, the method comprising the steps of: A signal detection method for detecting a binary symbol sequence that is most likely to have been transmitted or recorded from a sample signal, the method comprising: repeatedly calculating a new difference metric value from a currently input sample signal and a difference metric value for each sampling time, The metric value represents a value between the survival metric values, and each survival metric value detects a signal using two state trellises while the already stored binary Viterbi decoder uses eight state trellises, By measuring the EPR-IV signal, it is possible to obtain the difference metric without having to obtain the survival metric for the survival sequence. Can reduce the amount of calculation and the size of the storage device.