Nonlinear precoding in code-division multiple access communication system

摘要

A method for preprocessing a spread-spectrum transmission, comprising the steps of:receiving channel state information for multipath channels to K receivers, K ≥ 2;precoding incoming K × 1 symbol vectors prior to transmission byapplying a first feedback filter to a previously-precoded vector, and subtracting from the incoming K × 1 symbol vector to cancel intersymbol interference, the first feedback filter generated using the channel state information; andapplying a second feedback filter and a feedforward filter, the second feedback filter and the feedforward filter arranged so as to use the channel state information to cancel multiuser interference along the multipath channels to the K receivers.