Patent ID: 6795693
Filing Date: 2004-09-21
Classification: H04B,H04L

Abstract:
A method for controlling a transmitter part of a radio transceiver, said transmitter part comprising an IQ modulator, said radio transceiver further comprising a receiver part comprising an IQ demodulator, said radio transceiver being dedicated to transmit a modulated information signal over an air interface, said method comprising the steps of:storing an IQ modulation vector obtained at said IQ modulator and associated to a portion of said modulated information signal; looping said portion of said modulated information signal from said transmitter part to said receiver part, via a simulated radio interface; estimating an error vector by comparing said IQ modulation vector to an IQ demodulation vector obtained by demodulation of said portion of said modulated information signal at said IQ demodulator; and modifying transmitter part parameters to correct non-linearity of said transmitter part and a power drift of said modulated information signal according to said error vector.