Method and system of calibration of a second order intermodulation intercept point of a radio transceiver

Method of suppression of second order intermodulation of reception means of a radio transceiver, the method comprising:

• injecting a transmit radiofrequency signal from an up converter of transmission means into a mixer of reception means;
• generating a second order intermodulation reference signal from a transmission baseband signal;
• estimating a second order intermodulation power from the second order intermodulation reference signal and a radio transceiver output signal;
• tuning a second order intermodulation intercept point corresponding to a lowest second order intermodulation power;
• extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power found;
• and
• subtracting the second order intermodulation signal from the radio transceiver output signal.

System of suppression of second order intermodulation of reception means of a radio transceiver, the system comprising:

• injecting means configured to inject a transmit radiofrequency signal from an up converter of transmission means into a mixer of reception means,
• generating means configured to generate a second order intermodulation reference signal from a transmission baseband signal,
• estimating means configured to estimate the second order intermodulation power from the second order intermodulation reference signal and a radio transceiver output signal,
• extracting means configured to extract an optimum second order intermodulation intercept point corresponding to a lowest second order intermodulation power, and
• subtraction means configured to subtract the second order intermodulation signal extracted from the radio transceiver output signal to the radio transceiver output signal.