56
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Full-Duplex Mobile Device - Pushing the Limits

      Preprint

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          In this article, we focus on the challenges of transmitter-receiver isolation in mobile full-duplex devices, building on shared-antenna based transceiver architecture. Firstly, self-adaptive analog RF cancellation circuitry is required, since the capability to track time-varying self-interference coupling characteristics is of utmost importance in mobile devices. Furthermore, novel adaptive nonlinear DSP methods are also required for final self-interference suppression at digital baseband, since mobile-scale devices typically operate under highly nonlinear low-cost RF components. In addition to describing above kind of advanced circuit and signal processing solutions, comprehensive measurement results from a complete demonstrator implementation are also provided, evidencing beyond 40 dB of active RF cancellation over a 80 MHz waveform bandwidth with a highly nonlinear transmitter power amplifier. Measured examples also demonstrate the good self-healing characteristics of the developed control loop against fast changes in the coupling channel. Furthermore, when complemented with nonlinear digital cancellation processing, the residual self-interference level is pushed down to the noise floor of the demonstration system, despite the harsh nonlinear nature of the self-interference. These findings indicate that deploying the full-duplex principle can indeed be feasible also in mobile devices, and thus be one potential technology in, e.g., 5G and beyond radio systems.

          Related collections

          Author and article information

          Journal
          2014-10-13
          2016-02-05
          Article
          1410.3191
          0af21d31-6341-46ad-ab77-e4339417e228

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          18 pages, submitted for review
          cs.IT math.IT

          Numerical methods,Information systems & theory
          Numerical methods, Information systems & theory

          Comments

          Comment on this article