Patent ID: 7206356

Claim:
A wireless transmitter for transmitting a signal, said wireless transmitter composed of at least one modulator, said modulator comprising a digital part and an analog part, wherein the digital part comprises: envelope generating means for generating an envelope signal carrying envelope information of the signal modulated with a first carrier frequency, referred to as a first modulated signal; first delaying means for delaying the first modulated signal, wherein said first delaying means comprises a first variable interpolation cell; phase generating means for generating a phase signal carrying phase information of the delayed first modulated signal, said phase and envelope signals being used to produce a second modulated signal by transposing the modulation of said signal from the first carrier frequency to a second carrier frequency; second delaying means for delaying the first modulated signal, wherein said second delaying means comprises a second variable interpolation cell; comparison means for comparing the second modulated signal with the delayed first modulated signal using the second delaying means; and controlling means adapted to supply said first and second variable interpolations cells control signals for enabling the delays applied by said first and second cells to be adjusted.