In this article, we propose sampled-data design of digital filters thatcancel the continuous-time effect of coupling waves in a single-frequencyfull-duplex relay station. In this study, we model a relay station as acontinuoustime system while conventional researches treat it as a discrete-timesystem. For a continuous-time model, we propose digital feedback canceler basedon the sampled-data H-infinity control theory to cancel coupling waves takingintersample behavior into account. We also propose robust control againstunknown multipath interference. Simulation results are shown to illustrate theeffectiveness of the proposed method.
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