Broadband RF front-end based on the six-port network architecture for software defined radio

This paper presents a Software Defined Radio (SDR) six-port receiver for a novel broadband mobile communications system. The prototype covers the frequency range from 700 MHz to 6 GHz, and operates with up to 100 MHz-wide channels. We have validated the prototype with several types of modulation schemes at different frequency bands. The six-port receiver has been satisfactory proved for data rates up to 75 Mb/s (limited by the available test instruments). The measured results show good performance of the implemented six-port receiver.