Metasurface-Programmable Wireless Network-On-Chip

doi:10.1002/advs.202201458

Metasurface-Programmable Wireless Network-On-Chip

2022-06-24

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Mohammadreza F. Imani

DOI：10.1002/advs.202201458

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This paper introduces the concept of smart radio environments, currently intensely studied for wireless communication in metasurface-programmable meter-scaled environments (e.g., inside rooms), on the chip scale. Wireless networks-on-chips (WNoCs) are a candidate technology to improve inter-core communication on chips but current proposals are plagued by a dilemma: either the received signal is weak, or it is significantly reverberated such that the on-off-keying modulation speed must be throttled. Here, this vexing problem is overcome by endowing the wireless on-chip environment with in situ programmability which enables the shaping of the channel impulse response (CIR); thereby, a pulse-like CIR shape can be imposed despite strong multipath propagation and without entailing a reduced received signal strength. First, a programmable metasurface suitable for integration in the on-chip environment (on-chip reconfigurable intelligent surface) is designed and characterized. Second, its configuration is optimized to equalize selected wireless on-chip channels over the air. Third, by conducting a rigorous communication analysis, the feasibility of significantly higher modulation speeds with shaped CIRs is evidenced. The results introduce a programmability paradigm to WNoCs which boosts their competitiveness as complementary on-chip interconnect solution.

Keywords:

over-the-air equalization

programmable metasurface

smart radio environment

wave chaos

wireless communication

wireless network-on-chip

Metasurface-Programmable Wireless Network-On-Chip

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