Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have...Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications.展开更多
基于未来电网需求和智能电网愿景,提出了智能电网的架构目标和原则,强调现有电网资源的有效利用,其服务和程序的可重用性、可移植性、系统的易管理性。设计了智能电网信息通信架构的演进路线,实现了架构从业务筒仓到系统集成的过渡。提...基于未来电网需求和智能电网愿景,提出了智能电网的架构目标和原则,强调现有电网资源的有效利用,其服务和程序的可重用性、可移植性、系统的易管理性。设计了智能电网信息通信架构的演进路线,实现了架构从业务筒仓到系统集成的过渡。提出了基于开放标准分层服务的未来智能电网架构设想,以"系统的系统"(system of systems,SOS)为特点,支持演进路线,面向服务高度集成,基于开放标准使服务和接口具有很高的可重用性和松耦合性,使得架构在面对未来的未知需求时具有很强的适应性、健壮性和灵活性,随需应变。展开更多
基金supported in part by the National Science Foundation(NSFC)for Distinguished Young Scholars of China with Grant 61625106the National Natural Science Foundation of China under Grant 61531011
文摘Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications.
文摘基于未来电网需求和智能电网愿景,提出了智能电网的架构目标和原则,强调现有电网资源的有效利用,其服务和程序的可重用性、可移植性、系统的易管理性。设计了智能电网信息通信架构的演进路线,实现了架构从业务筒仓到系统集成的过渡。提出了基于开放标准分层服务的未来智能电网架构设想,以"系统的系统"(system of systems,SOS)为特点,支持演进路线,面向服务高度集成,基于开放标准使服务和接口具有很高的可重用性和松耦合性,使得架构在面对未来的未知需求时具有很强的适应性、健壮性和灵活性,随需应变。
