Systems and methods for cancelling intermodulation

A radio frequency communication device comprising:

• a radio frequency front-end system, the front-end module including a first radio frequency circuit configured to transmit and receive over a first frequency division duplex communication band, and a second radio frequency circuit configured to transmit and receive over a second frequency division duplex communication band;
• and
• one or more processors configured:
• to cause one of the first radio frequency circuit or the second radio frequency circuit to transmit according to a duty cycle;
• to analyze a signal received during the duty cycling by the first radio frequency circuit or by the second radio frequency circuit;
• and, based on the analysis, to calculate intermodulation distortion.

A method of operating a mobile device, the method comprising:

• transmitting and receiving over a first frequency division duplex communication band with a first radio frequency circuit of a mobile device;
• transmitting and receiving over a second frequency division duplex communication band with a second radio frequency circuit of the mobile device;
• causing the first radio frequency circuit to transmit according to a duty cycle;
• with one or more processors, analyzing a signal received during the duty cycling by the first radio frequency circuit or by the second radio frequency circuit;
• and
• based on the analysis, calculating, with the one or more processors, intermodulation distortion between the first radio frequency circuit and the second radio frequency ciruit.