Initial calibration procedure of a six-port receiver system for complex data reception

In this publication a six-port receiver system for reception of modulated I/Q-data is shown. The system contains of passive six-port and diode structures to mix the signal to baseband. After digitizing the baseband voltages, a complex vector can be calculated. The binary data reconstruction is done by mapping these complex vector to the correct data symbol in the constellation diagram. Therefore, the data rate has to be reconstructed as described here. Furthermore, a simple calibration technique is explained and some measurements are taken to prove the functionality of the system and the simulation results.