Patent ID: 6954627
Filing Date: 2005-10-11
Classification: H03F,H04B

Abstract:
1. A method of canceling cross-modulation in a wireless communications module including a receive path, comprising operations of: in the receive path, receiving a source signal including an amplitude modulated bleed over signal, a jammer signal, and a receive signal having a receive frequency bandwidth; computing a dummy envelope that would yield a predetermined constant if an envelope of the bleed-over signal and the dummy envelope were to be processed by predetermined formulas and the processed envelopes added, the predetermined formulas comprising squaring the bleed-over envelope and squaring the dummy envelope; creating an amplitude modulated dummy signal exhibiting the dummy envelope and occupying a dummy frequency bandwidth that differs from the receive frequency bandwidth; adding the source signal and the dummy signal to form a combined signal; directing the combined signal to a nonlinear device in the receive path.