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. 2018 Nov 15;6(2):231–238. doi: 10.1093/nsr/nwy135

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© The Author(s) 2018. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 4. — (a) Schematic of the proposed BFSK wireless communication system based on the time-domain digital-coding metasurface. (b) Experimental scenario of the BFSK wireless communication system with the transmission process described on the right. (c) and (d) The received messages by the BFSK wireless communication system for different receiving angles α = 0° and 30°, respectively. (e) and (f) Receiving process of the BFSK wireless communication system with an interference frequency at f_c +550 kHz, while the signal frequency is f_c ±312.5 kHz, to show robust anti-interference ability.