Patent ID: 7116735

Claim:
An adaptive equalization apparatus comprising a sync word generator for delivering a sync word signal sequence which is the same as a sync word transmitted by a transmitter; a correlator for receiving the sync word signal and a received signal and for calculating a correlation between the received signal and the sync word to deliver a correlation value as a correlation output signal; a power variance measuring unit for receiving the correlation output signal and a threshold value as inputs, for determining a mean value and a variance of the correlation output signal within a given time span while shifting the time span in the time domain, and for delivering K variances (where K is an integer equal to or greater than 1) at timings where the mean value is greater than the threshold signal; a symbol sync timing generator for generating K symbol sync timing signals on the basis of the timings; a sampler for sampling the received signal using the K symbol sync timing signals; and an adaptive equalizer for receiving the sampled received signal as an input and for applying an adaptive equalization to the received signal to deliver a decided symbol.