Sampled-Data H-infinity Design of Coupling Wave Cancelers in   Single-Frequency Full-Duplex Relay Stations
  In this article, we propose sampled-data H-infinity design of digital filters that cancel the continuous-time effect of coupling waves in a single-frequency full-duplex relay station. In this study, we model a relay station as a continuous-time system while conventional researches treat it as a discrete-time system. For a continuous-time model, we propose digital feedforward and feedback cancelers based on the sampled-data control theory to cancel coupling waves taking intersample behavior into account. Simulation results are shown to illustrate the effectiveness of the proposed method. 
Masaaki Nagahara, Hampei Sasahara, Kazunori Hayashi, and Yutaka   Yamamoto
cs.SY cs.IT math.IT math.OC