In the calibration of a vector demodulator, a statistical approach is used for the analysis and correction of received data. The magnitude of each vector, defined by an (I,Q) pair in a received data signal, is examined. If each measured magnitude has a predetermined value, calibration is not necessary....http://www.google.com.hk/patents/US5321726?utm_source=gb-gplus-share專利 US5321726 - Calibration of vector demodulator using statistical analysis
