Advanced Self-interference Cancellation and Multiantenna Techniques for   Full-Duplex Radios
  In an in-band full-duplex system, radios transmit and receive simultaneously in the same frequency band at the same time, providing a radical improvement in spectral efficiency over a half-duplex system. However, in order to design such a system, it is necessary to mitigate the self-interference due to simultaneous transmission and reception, which seriously limits the maximum transmit power of the full-duplex device. Especially, large differences in power levels in the receiver front-end sets stringent requirements for the linearity of the transceiver electronics. We present an advanced architecture for a compact full-duplex multiantenna transceiver combining antenna design with analog and digital cancellation, including both linear and nonlinear signal processing. 
Dani Korpi, Sathya Venkatasubramanian, Taneli Riihonen, Lauri Anttila,   Strasdosky Otewa, Clemens Icheln, Katsuyuki Haneda,...
cs.OH