Calibration of a n-port receiver

Details Calibration of a n-port receiver Calibration of a n-port receiver

H - Electricity

04

B

H04B 1/26 (2006.01) H03D 9/04 (2006.01) H04B 1/30 (2006.01) H04L 27/233 (2006.01)

Patent

CA 2310924

A technique for calibrating a N-port receiver, such as for example a 5- or 6- port receiver is proposed. The N-port receiver comprises a first input for a RF signal to be detected, a second input for a RF signal originating from a local oscillator and N-2 output terminals. Calibrating signals are generated on the basis of the RF signal supplied by the local oscillator. The calibration signals are fed to the first input and/or second input of the N-port receiver. Calibration coefficients are calculated on the basis of the output signals generated by the N-port receiver in response to the feeding of the calibration signals. The calibration signals are unmodulated signals and are only processed by means of a passive RF circuitry in the calibration device. The solutions according to the present invention allow a simple calibration of N-port receivers, which can be used as IQ demodulators or converters. Thereby a local oscillator is used as a RF source for the calibration.

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