Patent ID: 6049577
Filing Date: 2000-04-11
Classification: H04L

Abstract:
A method of detecting a predetermined pattern of known samples corresponding to a sequence of symbols transmitted by a transmitter to a receiver through a channel, the predetermined pattern being part of a stream of symbols transmitted by the transmitter, the predetermined pattern being formed from a series of repeated subpatterns, the method comprising:receiving a sequence of received samples, the sequence of received samples corresponding to a section of the stream of symbols;mapping samples of the sequence of received samples into a set of sample positions corresponding to sample positions of a subpattern;estimating an impulse response of the channel,determining a vector of estimated samples as a function of the estimated impulse response;generating, for each sample position of a subpattern, an error sample as a function of the vector of estimated samples and a vector of received samples, the vector of received samples being dependent on a received sample taken during the sample position;averaging the values of a current error sample and the previous K-1 error samples corresponding to the sample position of the current error sample to form a corresponding first average for the sample position, K being an integer greater than one; andcomparing the first average to a predetermined threshold value.