ESTIMATION OF WIRELESS CHANNEL IMPULSE RESPONSE USING A PREAMBLE

摘要

A channel estimator for use with the wireless digital data receiver facilitates processing of a preamble symbol sequence received over a multipath communication channel to enable the impulse response of the channel to be rapidly estimated, and set the parameters of the receiver's decision feedback equalizer. During the preamble dwell interval, selected estimates of one or more received preamble symbols within a plurality of successive data symbols are repeated, in order to generate a longer sequence of preamble symbol estimates. The receiver's processor then employs this longer sequence of data symbol values, to solve an associated set of linear equations for estimating the multipath channel's impulse response.