Experiment-Driven Characterization of Full-Duplex Wireless Systems

Current deployed wireless communication systems employ either a time-division or frequency division approach to bidirectional communication. This requires dividing the temporal and/or spectral resources into orthogonal resources and results in half-duplex wireless communication systems. The key deterrent in implementing a full-duplex wireless communication system, which consists on same band simultaneous bidirectional communication, is the large self-interference from a node's own transmissions in comparison to the signal-of-interest from the distant transmitting antenna. The large self-interference spans most of the dynamic range of the analog-to-digital converter in the receiving chain, which in turn dramatically increases the quantization noise for the signal-of-interest.