Wide Band, High Power, Same-Channel Full Duplex Transceiver System Demonstration

Full duplex communication systems promise to double the available spectrum by enabling simultaneous transmit and receive capabilities. Receiver linearity and its effective isolation from the transmitter must be extremely large to allow detection of any desired signals in the presence of self-interference within the receiver bandwidth. Echoes from the environment may introduce additional distortion that further hinder detection. These challenges are multiplied if full duplex capability is to be achieved over wide bandwidths. This paper describes and demonstrates the performance of a novel wide band transceiver architecture for full duplex applications. The full duplex performance is agnostic to the transmitter hardware in use. Measurements demonstrate the simultaneous detection of an complex communication signal and a chirp signal completely uncorrelated with the transmitted signal which delivers 45 (dBm) to the antenna at the same time in the same bandwidth. To the authors' knowledge, the novel transceiver architecture demonstrate state-of-the-art full duplex operation.