Calibration scheme for LINC transmitter

A simple calibration scheme for correction of the path imbalance in a LINC transmitter is presented. Bq properly exchanging two LINC vector components and controlling a downconversion loop. the gain and phase imbalance are ch aracterised bq the baseband DSP/SCS. The error effects of the imbalance are compensated bq introducing a pre-distortion term. Simulation results demon strate that this scheme is sufficient to suppress the out-of-hand spectrum for wireless communications.