التفاصيل البيبلوغرافية
| العنوان: |
Full-duplex mobile device: pushing the limits. |
| المؤلفون: |
Korpi, Dani, Tamminen, Joose, Turunen, Matias, Huusari, Timo, Choi, Yang-Seok, Anttila, Lauri, Talwar, Shilpa, Valkama, Mikko |
| المصدر: |
IEEE Communications Magazine; Sep2016, Vol. 54 Issue 9, p80-87, 8p |
| مصطلحات موضوعية: |
RADIO transmitter-receivers -- Design & construction, CELL phone systems, ANTENNAS (Electronics), INTERFERENCE (Telecommunication), RADIO frequency |
| مستخلص: |
In this article, we address the challenges of transmitter-receiver isolation in mobile full-duplex devices, building on shared-antenna-based transceiver architecture. First, self-adaptive analog RF cancellation circuitry is required, since the ability to track time-varying self-interference coupling characteristics is of utmost importance in mobile devices. In addition, 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 the above kind of advanced circuit and signal processing solutions, comprehensive RF measurement results from a complete demonstrator implementation are also provided, evidencing beyond 40 dB of active RF cancellation over an 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 by 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 also be feasible in mobile devices, and thus be one potential technology in, for example, 5G and beyond radio systems. [ABSTRACT FROM PUBLISHER] |
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| قاعدة البيانات: |
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