MAXIMUM LIKELIHOOD DETECTING METHOD, ADAPTATION METHOD, CORRECTION METHOD, MAXIMUM LIKELIHOOD DETECTOR, ADAPTER AND CORRECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide adaptive maximum likelihood detection. SOLUTION: In the adapter and the method for adapting a programmable digital maximum likelihood detector to variable channel output and the correction system for correcting the programmable digital maximum likelihood detector from unknown data in the known code of the variable channel output, the maximum likelihood detector has a number of maximum likelihood states. The detector detects the digital sample of a recorded analog signal corresponding to one of maximum likelihood states. An accumulator partially accumulates the detected digital sample to digital samples, which are detected before, corresponding to one of maximum likelihood states. The logic connected to the accumulator determines at least one numerical metric coefficient for adapting the digital sample to one of maximum likelihood states by using the digital samples accumulated corresponding to the maximum likelihood states and updates or sets the numerical metric coefficient.