Self-interference cancellation for simultaneous transmit and receive applications

As the demand for frequency spectrum increases with new technological advancements in radar and communications, the frequency spectrum is becoming increasingly limited and overcrowded. This is driving research in Simultaneous Transmit and Receive (STAR) systems as there is a growing need for systems with higher spectral efficiency. Conventional systems operate in half-duplex mode, either transmitting and receiving at different times, over different frequency bands, or using other multiple access techniques. This paper presents a practical STAR demonstrator system developed at the University of Cape Town.