Six-Port Based High Performance Concurrent Dual-Band Receiver

In this paper we present an optimized calibration approach for a dual band direct conversion six-port based receiver (SPR). The proposed approach is based on behavioral nonlinear modeling that jointly compensates for the frequency response, nonlinearity and memory effects of the receiver. The performances in terms of error vector magnitude (EVM) and complexity of the proposed calibration technique has been presented. For test and validation purposes the dual band SPR was tested using two QAM signals with 2 MHz bandwidth. Simulations and experiments have revealed a signal recovery with an EVM as low as 2% for reasonable problem complexity and size.