Asymmetric Full-Duplex with Contiguous Downlink Carrier Aggregation

Dani Korpi1, Lauri Anttila, Mikko Valkama2

  • 1Tampere University of Technology
  • 2Tampere University of technology



Technical Session: Poster


Signal Processing for Wireless Communications


15:15 - 16:45 | Wed 6 Jul | Salisbury A | S14

Signal Processing for full-duplex communications


In this paper, a contiguous carrier aggregation scheme for the downlink transmissions in an inband full-duplex cellular network is analyzed. In particular, we consider a scenario where the base station transmits over a wider bandwidth than the mobiles, while both parties are still using the same center frequency. As a result, the mobiles must cancel their own self-interference over a wider bandwidth, when compared to a situation where the uplink and downlink frequency bands are symmetric. Furthermore, due to the inherent RF impairments in the mobile devices, nonlinear modeling of the self-interference is required in the digital domain to fully cancel it over the whole reception bandwidth. The feasibility of the proposed scheme is demonstrated with real-life RF measurements, using two different bandwidths. In both of these cases, it is shown that the SI can be attenuated below the noise floor over the whole reception bandwidth.

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