Method and system of calibration of a second order intermodulation intercept point of a radio transceiver
First Claim
1. Method of calibration of a second order intermodulation intercept point of a radio transceiver, the method comprising:
- 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 tuner to correspond to a lowest second order intermodulation power; and
extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power.
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Abstract
The method of calibration of a second order intermodulation intercept point (IIP2) of a radio transceiver comprises the steps of: generating a second order intermodulation (IM2) reference signal (STXIM2-REF) from a transmission baseband signal (STXBB-REF); estimating a second order intermodulation power from the second order intermodulation reference signal (STXIM2-REF) and a radio transceiver output signal (Output); tuning a second order intermodulation intercept point tuner to find a lowest second order intermodulation power; extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power.
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Citations
16 Claims
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1. Method of calibration of a second order intermodulation intercept point of a radio transceiver, the method comprising:
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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 tuner to correspond to a lowest second order intermodulation power; and extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power. - View Dependent Claims (2, 3, 4)
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5. Method of suppression of second order intermodulation of reception means of a radio transceiver, the method comprising:
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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. - View Dependent Claims (6, 7, 8)
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9. System of calibration of a second order intermodulation intercept point of a radio transceiver, the system comprising:
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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, and extracting means configured to extract an optimum second order intermodulation intercept point corresponding to a lowest second order intermodulation power. - View Dependent Claims (10, 11, 12)
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13. System of suppression of second order intermodulation of reception means of a radio transceiver, the system comprising:
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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. - View Dependent Claims (14, 15, 16)
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Specification