Patent ID: 6661857
Filing Date: 2003-12-09
Classification: H04L

Abstract:
A method of establishing a communication link between transmitter and receiver sites of a wireless digital data communication system comprising the steps of:at said transmitter site, (a) transmitting a preamble message containing a sequence of data symbols; at said receiver site, (b) receiving said preamble message transmitted in step (a); (c) processing said preamble message received in step (b) to derive estimates of data symbols of said sequence; (d) processing a first number of estimates of data symbols derived in step (c) to obtain a second number of estimates of data symbols, larger than said first number; (e) processing said second number of estimates of data symbols obtained in step (d) to generate an estimate of the channel over which said preamble message has been transmitted from said transmitter site to said receiver site; and (f) setting parameters of a signal processor by way of which a data message, transmitted by said transmitter site to said receiver site subsequent to said preamble message, is to be recovered, in accordance with said estimate of the channel generated in step (e).