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Implementation of a concentration-controlled chemical clock

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Science China(Information Sciences) 2021年第12期64卷 262-264页

作者： Chongzhou FANG Lulu GE Xiaosi TAN Ziyuan SHEN zaichen zhang Xiaohu YOU Chuan zhang Lab of Efficient Architectures for Digital-communication and Signal-processing (LEADS) Southeast University National Mobile Communications Research Laboratory Southeast University

Dear editor,In recent decades, researchers have started seeking for substitutes for silicon based circuits to perform computation in other fields, including synthetic biology and molecular computing [1, 2].Previous re... 详细信息

关键词： Chemical clock DNA strand displacement Mass action kinetics Molecular computing Concentration

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海洋信息工程专业建设与人才培养改革

电气电子教学学报 2024年第1期46卷 41-44页

作者：赵安明郭坤余超安良张在琛东南大学信息科学与工程学院南京210096 东南大学材料科学与工程学院南京210096

东南大学信息科学与工程学院,积极响应国家建设海洋强国的号召,主动申报建设海洋信息工程本科新专业,为国家和社会培养急需紧缺的海洋建设与开发人才。学校建设海洋信息工程专业拥有厚重的历史积淀和强势的学科优势,实验实践条件完备、... 详细信息

东南大学信息科学与工程学院,积极响应国家建设海洋强国的号召,主动申报建设海洋信息工程本科新专业,为国家和社会培养急需紧缺的海洋建设与开发人才。学校建设海洋信息工程专业拥有厚重的历史积淀和强势的学科优势,实验实践条件完备、人才培养方案设置科学、课程体系建设合理,为海洋信息工程专业的人才培养提供了坚实基础。多学科交叉融合、理论与实践相结合、国际化教学是海洋信息工程专业建设与改革的主要特点。

关键词：海洋信息工程专业建设人才培养

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Journal of Electronics(China) 2008年第5期25卷 685-688页

作者： zhang zaichen Yu Xutao Bi Guangguo （National Mobile Communications Research Lab Southeast University Nanjing 210096 China

In this letter,we propose a hybrid analog/digital detection algorithm,the Correlated In-terference Cancellation(CIC) algorithm,for Impulse Radio Ultra-WideBand(IR-UWB) *** CIC algorithm correlates received signal with its delayed versions in the analog domain and samples the correlation output at the symbol *** symbol rate samples are processed in the digital domain to perform interference ***,CIC works for high data rate systems with heavy In-terSymbol Interference(ISI).Simulation results show that CIC achieves good performance in typical UWB channels.

关键词： Impulse Radio Ultra-WideBand (IR-UWB) Correlated Interference Cancellation (CIC) Receiver

A metasurface-based light-to-microwave transmitter for hybrid wireless communications

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Light(Science & Applications) 2022年第6期11卷 1139-1148页

作者： Xin Ge zhang Ya Lun Sun Bingcheng Zhu Wei Xiang Jiang Qian Yu Han Wei Tian Cheng-Wei Qiu zaichen zhang Tie Jun Cui State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast University210096 NanjingChina National Mobile Communications Research Laboratory School of Information Science and EngineeringSoutheast University210096 NanjingChina Frontiers Science Center for Mobile Information Communication and Security Southeast University210096 NanjingChina Purple Mountain Laboratories 211111 NanjingChina Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore

Signal conversion plays an important role in many applications such as communication,sensing,and *** signal conversion between optical and microwave frequencies is a crucial step to construct hybrid communication systems that combine both optical and microwave wireless technologies to achieve better features,which are highly desirable in the future wireless ***,such a signal conversion process typically requires a complicated relay to perform multiple operations,which will consume additional hardware/time/energy ***,we report a light-to-microwave transmitter based on the time-varying and programmable metasurface integrated with a high-speed photoelectric detection circuit into a *** a transmitter can convert a light intensity signal to two microwave binary frequency shift keying signals by using the dispersion characteristics of the metasurface to implement the frequency division *** illustrate the metasurface-based transmitter,a hybrid wireless communication system that allows dual-channel data transmissions in a light-to-microwave link is demonstrated,and the experimental results show that two different videos can be transmitted and received simultaneously and *** metasurface-enabled signal conversion solution may enrich the functionalities of metasurfaces,and could also stimulate new information-oriented applications.

关键词： microwave surface light

Joint Link Allocation and Rate Assignment Algorithm for Multi-Channel Wireless Networks

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China Communications 2012年第9期9卷 96-106页

作者： Yu Xutao Fang Xin zhang zaichen State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P. R. China College of Communication Engineering Hangzhou Dianzi University Hangzhou 310018 P. R. China State Key Laboratory of Mobile Communications Southeast University Nanjing 210096 P. R. China

This paper presents a link allocation and rate assignment algorithm for multi-channel wireless networks. The objective is to reduce network con-flicts and guarantee the fairness among links. We first design a new network model. With this net-work model, the multi-channel wireless network is divided into several subnets according to the num-ber of channels. Based on this, we present a link allocation algorithm with time complexity O（l^2）to al-locate all links to subnets. This link allocation algo-rithm adopts conflict matrix to minimize the network contention factor. After all links are allocated to subnets, the rate assignment algorithm to maximize a fairness utility in each subnet is presented. The rate assignment algorithm adopts a near-optirml al-gorithm based on dual decomposition and realizes in a distributed way. Simulation results demonstrate that, compared with IEEE 802.11b and slotted see-ded channel hopping algorithm, our algorithm de-creases network conflicts and improves the net-work throughput significantly.

关键词： multi-channel networks link allocation rate assignment conflict matrix fairness utilityfunction

Spectral Estimation based on Filter Bank and Cepstrum Thresholding for Cognitive Radios

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China Communications 2009年第1期6卷 92-98页

作者： Cao Zhiping, Bi Guangguo, zhang zaichen National Mobile Communication Research Laboratory, School of Information Science and Engineering, Southeast University, Nanjing 210096, China National Mobile Communication Research Laboratory School of Information Science and Engineering Southeast University Nanjing 210096 China

Spectrum sensing plays an important role in cognitive radio (CR). Nonparametric spectrum estimation is considered as a feasible candidate for CR. Some filter bank based periodogram algorithms, such as Thomson’s multitaper spectral estimator, can achieve fine spectral dynamic range1 but have large estimation variance. On the other hand, recently, Cepstrum Thresholding is proposed to reduce the variance of periodogram estimation. In this paper, we combine these two methods to achieve spectral dynamic range and variance request at the same time.

关键词： spectrum analysisfifilter bank cepstrum thresholding.

P×N IFFT FOR OFDM-BASED UWB SYSTEM

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Journal of Electronics(China) 2007年第1期24卷 116-118页

作者： zhang zaichen Bi Guangguo Southeast University Nanjing 210006 China

In this letter,P × N-pointIFFT is proposed to replace the N-point IFFT and analog fre-quency conversion in an Orthogonal Frequency Division Multiplexing (OFDM)-based Ultra-WideBand (UWB) system,and a new algorithm,na... 详细信息

关键词： Orthogonal Frequency Division Multiplexing (OFDM) Inverse Fast Fourier Transform (IFFT) Ultra-WideBand (UWB)

Light-controllable time-domain digital coding metasurfaces

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Advanced Photonics 2022年第2期4卷 52-58页

作者： Xin Ge zhang Ya Lun Sun Bingcheng Zhu Wei Xiang Jiang zaichen zhang Tie Jun Cui Southeast University School of Information Science and EngineeringState Key Laboratory of Millimeter WavesNanjingChina Southeast University School of Information Science and EngineeringNational Mobile Communications Research LaboratoryNanjingChina Purple Mountain Laboratories NanjingChina Southeast University Frontiers Science Center for Mobile Information Communication and SecurityNanjingChina

Programmable metasurfaces enable real-time control of electromagnetic waves in a digital coding manner,which are suitable for implementing time-domain metasurfaces with strong harmonic manipulation ***,the time-domain metasurfaces are usually realized by adopting the wired electrical control method,which is effective and robust,but there are still some ***,we propose a light-controllable time-domain digital coding metasurface consisting of a full-polarization dynamic metasurface and a high-speed photoelectric detection circuit,from which the microwave reflection spectra are manipulated by time-varying light signals with periodic phase *** demonstrated,the light-controllable timedomain digital coding metasurface is illuminated by the light signals with two designed time-coding *** measured results show that the metasurface can well generate symmetrical harmonics and white-noise-like spectra,respectively,under such cases in the reflected *** proposed lightcontrollable time-varying metasurface offers a planar interface to tailor and link microwaves with lights in the time domain,which could promote the development of photoelectric hybrid metasurfaces and related multiphysics applications.

关键词： metasurface light-control time-domain metamaterial

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DC-OFDM超宽带无线通信系统

高技术通讯 2007年第7期17卷 676-680页

作者：张在琛毕光国东南大学移动通信国家重点实验室南京210096

对高速超宽带（UWB）无线通信技术进行了研究,提出了双载波-正交频分复用（DC-OFDM）UWB系统方案,包括频带划分方案、帧结构和发射端系统方案以及参考接收机方案,给出了方案的计算机仿真结果和硬件实验结果.DC-OFDM UWB方案采用独创的... 详细信息

对高速超宽带（UWB）无线通信技术进行了研究,提出了双载波-正交频分复用（DC-OFDM）UWB系统方案,包括频带划分方案、帧结构和发射端系统方案以及参考接收机方案,给出了方案的计算机仿真结果和硬件实验结果.DC-OFDM UWB方案采用独创的双载波结构,降低了对射频和基带关键电路硬件实现的要求,获得了频域分集效果,提高了频谱使用灵活性.硬件实验系统的无线传输速率达到110 Mbps,传输距离为10m,信号发射功率小于0.1mW.

关键词：超宽带双载波正交频分复用