Patent ID: 6680978
Filing Date: 2004-01-20
Classification: H04B,H04L

Abstract:
A precoder for filtering a data symbol and providing a precoded signal, comprising:a summer for combining the data symbol and a filtered precoded symbol and outputting an adjusted data symbol; a modulo device having an upper amplitude boundary and a lower amplitude boundary for receiving the adjusted data symbol and outputting a bounded modulo signal; a peak-to-average ratio (PAR) controller coupled to the modulo device for generating a control signal, combining the control signal with the modulo signal so as to selectively adjust the amplitude bounds of the modulo signal such that a PAR of the combined modulo and control signal is reduced with respect to a PAR of the modulo signal, and outputting the precoded signal, wherein the combined modulo and control signal is the precoded signal; and a precoder filter coupled to the APR controller in a feedback arrangement for outputting the filtered precoded symbol to the summer.