New phase and gain imbalance correction algorithm for six-port-based direct-digital millimetric receivers

A novel algorithm for error correction in six-port-based direct receivers ( SPDR) is introduced. The new adaptive method provides a software correction of the hardware imperfection, such as phase and gain imbalance, improving the bit-error performances for direct receiver architectures. The resulting calibration procedure is performed on the incoming modulated signal, and h as no need for additional standards. (C) 2000 John Wiley & Sons, Inc.