Patent ID: 7590204

Claim:
In a high data rate communication receiver, wherein received signals contain digital data information that is error-corrected coded and interleaved to provide information symbols that are subsequently combined with reference symbols to provide a frame of data symbols that are filtered with a finite duration spectrum control impulse response for transmission at the data symbol rate by one or more transmit antennas over a fading dispersive channel with an associated set of multipath delays, a method of operating said receiver to enable said receiver to provide receive signals from one or more receive antennas and to produce within a data frame successive information symbol estimates that are subsequently used to reconstruct the digital data information, comprising the steps of: time-sampling received signals at an integer multiple, greater than one, of the data symbol rate within a receiver time block that has a time duration that is no more than one-half of the interleaving delay; correlating the time-sampled received signals and the spectrum control impulse response to provide fixed filter correlated signals; symbol combining the fixed filter correlated signals to provide nonstationary fixed filter matched signals, that depend on an estimation interval, corresponding to one or more information symbols and with duration equal to an integer multiple of the data symbol rate reciprocal, and that further depend on data symbol intervals within and later than the estimation interval; estimating channel parameters associated with the receiver time block that depend on products of the reference symbols and the nonstationary fixed filter matched signals; channel processing the nonstationary fixed filter matched signals and the channel parameters to provide channel matched signals; computing forward and backward filter weights that functionally depend on the channel parameters; creating past interference signals that depend on the estimation interval; multiplying the channel matched signals and the forward filter weights and further subtracting the past interference signals to provide the information symbol estimates; deinterleaving and decoding the information symbol estimates; selecting, from each estimation interval containing one or more information symbol estimates, associated information symbol decisions corresponding to possible transmitted information symbols; and wherein the creating step further includes: multiplying the backward filter weights and the information symbol decisions from previous estimation intervals.