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A 16-QAM 45-Gbps 7-m wireless link Using InP HEMT LNA and GaAs SBD Mixers at 220-GHz-Band

China Communications 2021年第5期18卷 255-262页

作者： Yukun Li Yong Zhang Chengkai Wu Jianhan Cui Huali Zhu Bo Yan School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

This paper presents a 220-GHz-band 7-m wireless link with a 45-Gbps transmission data rate by using 16 quadrature amplitude modulation(16-QAM).Super-heterodyne transceiver modules are developed for transmission and reception of the modulated signals,which consist of a Schottky barrier diodes(SBD)based sub-harmonic mixer(SHM),an InP HEMT low noise amplifier(LNA),a waveguide band-pass filter(BPF),and a 108-GHz local oscillator(LO)multiplier chain.The transmitter features a peak transmit power of 1.41 dBm,and the IF frequency varies from 5 GHz to 20 GHz.Besides,the receiver features a conversion gain of 9.3 dB in average and a noise temperature of 3052.8 K.The measured results indicate that the transceiver modules enable data transmission of a 45-Gbps 16-QAM signal with Signal-Noise-Ratio(SNR)from 11.59 dB to 15.36 dB in a 7-m line-of-sight channel.

关键词： wireless link 16 quadrature amplitude modulation(16-QAM) super-heterodyne transceiver modules sub-harmonic mixer(SHM)

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In-situ manipulation of wireless link with reinforcement-learningdriven programmable metasurface in indoor environment

Journal of Information and Intelligence

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Journal of Information and Intelligence 2023年第3期1卷 217-227页

作者： Jiawen Xu Rong Zhang Jie Ma Hanting Zhao Lianlin Li School of Electronic Engineering and Computer Science Peking UniversityBeijing 100871China State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China

It is of great importance to control flexibly wireless links in the modern society,especially with the advent of the Internet of Things(IoT),fifth-generation communication(5G),and beyond.Recently,we have witnessed that programmable metasurface(PM)or reconfigurable intelligent surface(RIS)has become a key enabling technology for manipulating flexibly the wireless link;however,one fundamental but challenging issue is to online design the PM's control sequence in a complicated wireless environment,such as the real-world indoor environment.Here,we propose a reinforcement learning(RL)approach to online control of the PM and thus in-situ improve the quality of the underline wireless link.We designed an inexpensive one-bit PM working at around 2.442 GHz and developed associated RL algorithms,and demonstrated experimentally that it is capable of enhancing the quality of commodity wireless link by a factor of about 10 dB and beyond in multiple scenarios,even if the wireless transmitter is in the glancing angle of the PM in the realworld indoor environment.Moreover,we also prove that our RL algorithm can be extended to improve the wireless signals of receivers in dual-receiver scenario.We faithfully expect that the presented technique could hold important potentials in future wireless communication,smart homes,and many other fields.

关键词： Programmable metasurface Reconfigurable intelligent surface Reinforcement learning wireless link

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A low-cost 10-Gbit/s millimeter-wave wireless link working at E-band

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Journal of Communications and Information Networks 2016年第2期1卷 109-114页

作者： HUANG Linpu ZHOU Zhigang ZHANG Jian Key Laboratory of Terahertz Solid-State Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Broadband wireless Technologies Lab(BWTL) Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

Test results for a 10-Gbps prototype demonstrator working at 71~76 GHz frequency band with a 2-bit/s/Hz spectral efficiency are reported.To overcome the speed limitation of the commercial DA/ADs,a two-channel analog IF multiplexing and demultiplexing topology is adopted as a trade-off between cost and spectrum efficiency.The same approach is also used to achieve up to 20 Gbps with a full 10-GHz bandwidth of the allocated commercial bands(71~76 GHz and 81~86 GHz).

关键词： millimeter-wave radio communication E-band wireless link transmitter receiver

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Design of Efficient Router with Low Power and Low Latency for Network on Chip

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Circuits and Systems 2016年第4期7卷 339-349页

作者： M. Deivakani D. Shanthi Department of Electronics and Communication Engineering PSNA College of Engineering and Technology Dindigul India Department of Computer Science Engineering PSNA College of Engineering and Technology Dindigul India

The NoC consists of processing element (PE), network interface (NI) and router. This paper proposes a hybrid scheme for Netwok of Chip (NoC), which aims at obtaining low latency and low power consumption by concerning wired and wireless links between routers. The main objective of this paper is to reduce the latency and power consumption of the network on chip architecture using wireless link between routers. In this paper, the power consumption is reduced by designing a low power router and latency is reduced by implementing a on-chip wireless communication as express links for transferring data from one subnet routers to another subnet routers. The average packet latency and normalized power consumption of proposed hybrid NoC router are analyzed for synthetic traffic loads as shuffle traffic, bitcomp traffic, transpose traffic and bitrev traffic. The proposed hybrid NoC router reduces the normalized power over the wired NoC by 12.18% in consumer traffic, 12.80% in AutoIndust traffic and 12.5% in MPEG2 traffic. The performance is also analyzed with real time traffic environments using Network simulator 2 tool.

关键词： Network on Chip Router Processing Element wireless link Power Consumption Average Packet Latency

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A wireless LAN Bridging Solution Based on Campus Network

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Journal of Electronic Science and Technology of China 2005年第1期3卷 14-17页

作者：刘航毛玉明 School of Communication and Information Engineering UESTC Chengdu 610054 China

This paper presents a creative wireless LAN (WLAN) bridging solution, concentrating on the overall realization of a well designed interconnection. This solution integrates effective traffic insulation, intended access control, and required address translation without interfering with the vested interest of internet service provider (ISP). The specific solution can be widely applied on the campus-dorm (off campus)-ISP internetworking mode, where it is hard to implement wired link between campus network and dorm network in terms of cost and existing environmental constraints.

关键词： WLAN bridging wireless link traffic insulation access control address translation

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