Patent ID: 6298050
Filing Date: 2001-10-02
Classification: H04B,H04W

Abstract:
An interference cancellation circuit for cancelling interference due to a particular user signal forming part of a digitized baseband composite signal when the particular user signal satisfies a predetermined constraint, the circuit comprising:a baseband detection unit for detecting one or more detected data channels from said particular user signal and making an air interface channel characterization which is an estimate of an air interface channel over which the particular user signal was transmitted;user signal regeneration circuitry for generating an interfering user signal reconstruction which is an estimate of said particular user signal by modulating said one or more data channel streams taking into account said air interface channel characterization;delay circuitry for delaying the digitized baseband composite signal an amount substantially equal to the time it takes the baseband detection unit and user signal regeneration circuitry to create interfering user signal reconstruction; andsubtraction circuitry for subtracting the interfering user signal reconstruction from the delayed digitized baseband composite signal to create a corrected digitized baseband composite signal.