In an in-band full-duplex system, radios transmit and receive simultaneouslyin the same frequency band at the same time, providing a radical improvement inspectral efficiency over a half-duplex system. However, in order to design sucha system, it is necessary to mitigate the self-interference due to simultaneoustransmission and reception, which seriously limits the maximum transmit powerof the full-duplex device. Especially, large differences in power levels in thereceiver front-end sets stringent requirements for the linearity of thetransceiver electronics. We present an advanced architecture for a compactfull-duplex multiantenna transceiver combining antenna design with analog anddigital cancellation, including both linear and nonlinear signal processing.
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