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2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

作者： Wu, Jiaze Duan, Xiaoming Ding, Yu Ju, Youlun School of Astronautics Harbin Institute of Technology Harbin150001 China National Key Laboratory of Tunable Laser Technology Harbin Institute of Technology Harbin150001 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (纸本)9781510662476

We proposed a Ho:GdVO4 laser operating at 2.05 µm which was directly in-band dual-end-pumped by a pair of 1.94 μm fiber-coupled laser diodes (LD). A Ho:GdVO4 crystal with doping of 1.0 at.% was used as the gain medium. In continuous-wave (CW) mode, we obtained the maximum output power of 6.5 W at 2047.9 nm with the absorbed pump power of 28 W, corresponding to a slope efficiency of 37.6 %. By using an LGS crystal as the electro-optical Q-switch, the highest peak power of 773.8 kW was obtained at a pulse repetition frequency (PRF) of 1 kHz, corresponding to a maximum pulse energy of 3.25 mJ and a pulse width of 4.2ns. © 2023 SPIE.

关键词： Q switching

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Intention recognition based on Hidden Markov Model for aerial target 13

Intention recognition based on Hidden Markov Model for aeria...

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13th International Conference on Signal Processing Systems, ICSPS 2021

作者： Chai, Huimin Zhang, Yong Song, Yanan School of Computer Science and Technology Xidian University Xi'an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (数字)9781510653184

ISBN: (纸本)9781510653177

The method of intention recognition based on HMM for aerial target is provided in the paper. The three HMMs are constructed in order to recognize the attack intention, evasion intention and escape intention respectively. The "left-right"structure is chosen to establish the HMMs. The target sensor data: target speed-approach angle and distance from enemy target to our side, is utilized as the observation sequence of the HMMs. Here, the discretization results of target sensor data are the input to the HMMs. The accuracy of target intention recognition is over 80.0% in simulation experiments, which show that the method is available and effective. © COPYRIGHT SPIE.

关键词： Hidden Markov models

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A Miniaturized Broadband Dual-Polarized Antenna 15

A Miniaturized Broadband Dual-Polarized Antenna

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15th International Conference on Microwave and Millimeter Wave technology, ICMMT 2023

作者： Sun, Tong-Shuai Liu, Zhen-Guo Lu, Wei-Bing State Key Laboratory of Millimeter Waves School of Information Science and Engineering Southeast University Nanjing 210096 China Center for Flexible RF Technology Frontiers Science Center for Mobile Information Communication and Security Southeast University Nanjing 210096 China

ISBN: (纸本)9798350338874

A miniaturized broadband dual-polarized antenna with high isolation and symmetric patterns is designed in this paper. The above antenna consists of two quadrature dipoles, a dielectric post, two coaxial lines, two short pins, and a metal reflector. The proposed antenna comes from the deformation of the metal loop dipole, which has the characteristics of broadband and miniaturization. The adoption of short pins makes the radiation patterns symmetrical and improves the isolation of feed ports, which facilitates the integration of the base station antenna array. The simulations show that the feed port isolation of the proposed antenna is below -30 dB and the length of each dipole is reduced by about 20%. Such an antenna structure facilitates the reduction of coupling between antenna elements and reduces the size of the array. © 2023 IEEE.

关键词： Antenna arrays

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High Precision Translational Compensation for Ultrahigh Resolution ISAR 13

High Precision Translational Compensation for Ultrahigh Reso...

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13th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2021

作者： Yang, Lichao Science and Technology on Communication Information Security Control Laboratory No. 36 Research Institute of CETC China

ISBN: (纸本)9781665418126

In recent years, due to the emergence of ultrahigh resolution (UHR) radar systems, the bandwidth of radar has been increasing. However, conventional imaging algorithms have difficulties in the translational compensation of UHR inverse synthetic aperture radar (ISAR) data with high order range cell migration (RCM) and phase error. In this paper, a high-precision translational compensation method based on power flatness optimization (PFO) is proposed. The algorithm constructs the optimal criterion of power flatness and ensure the complete extraction of the prominent point energy. Then, the original data is compensated in the two-dimensional data domain through the prominent point phase inversion matrix. The results show that the proposed algorithm has significantly improved accuracy in the translational compensation of ultrahigh-resolution ISAR imaging compared with traditional algorithms. © 2021 IEEE.

关键词： Inverse synthetic aperture radar

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Spatiotemporal optical vortices generation in the green and ultraviolet via frequency upconversion[Invited]

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Chinese Optics Letters 2023年第8期21卷 12-16页

作者：高雪晨赵雨薇王珏卢扬张家璇范锦涛胡明列 Ultrafast Laser Laboratory Key Laboratory of Opto-electronic Information Science and Technology of Ministry of EducationSchool of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China

As a newly discovered type of structured light,a spatiotemporal optical vortex(STOV),which is remarkable for its space–time spiral phase and transverse orbital angular momentum(OAM),has garnered substantial *** previous studies have focused on the generation,characterization,and propagation of STOVs,but their nonlinear frequency conversion remains largely ***,we experimentally demonstrate the generation of green and ultraviolet(UV)STOVs by frequency upconversion of a STOV carried near-infrared(NIR)pulse emitted by a high repetition rate Yb-doped fiber laser amplifier ***,we verify that the topological charge of spatiotemporal OAM(ST-OAM)is doubled along with the optical frequency in the second-harmonic generation(SHG)process,which is visualized by the diffraction patterns of the STOVs in the fundamental and second-harmonic ***,the space–time characteristic of NIR STOV is successfully mapped to UV STOV by sum-frequency mixing STOV at 1037 nm and Gaussian beams in the green ***,we observe the topological charges of the ST-OAM could be degraded owing to strong space–time coupling and complex spatiotemporal astigmatism of such *** results not only deepen our understanding of nonlinear manipulation of STOAM spectra and the generation of STOVs at a new shorter wavelength,but also may promote new applications in both classical and quantum optics.

关键词： ultraviolet spatiotemporal optical vortex second-harmonic generation sum-frequency generation

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Node Locations-based Ad-Hoc Topology Analysis Using Minimum Connected Dominating Set

Journal of Network Intelligence

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Journal of Network Intelligence 2022年第1期7卷 231-242页

作者： Xu, Jian-Liang Lou, Hua-Xun Wang, Zhe Lu, Zhe-Ming The 36th Research Institute of China Electronics Technology Group Corporation Jiaxing314033 China Key Laboratory of Communication Information Control and Security Technology Jiaxing314033 China School of Aeronautics and Astronautics Zhejiang University Hangzhou310027 China

In the battlefield environment, sometimes only the location information of the battlefield network nodes can be obtained, but it is difficult to obtain the communication relationship information between the nodes. In this case, it becomes very difficult to identify the topology. However, from the perspective of network coverage design and topology control, this is similar to a distributed topology control algorithm based on node location information. This paper presents a scheme based on minimum connected dominating set to solve the problem of Ad hoc access network topology analysis, it can finally output key nodes and key links. The core idea is to find the smallest number of dominators among all network nodes as key nodes. The shortest path between the two dominators is the critical *** results demonstrate the effectiveness of the proposed scheme. © 2022, Taiwan Ubiquitous information CO LTD. All rights reserved.

关键词： Mobile ad hoc networks

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Joint Beam Management and SLAM for mmWave communication Systems

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IEEE Transactions on communications 2023年第10期71卷 6162-6179页

作者： Que, Hang Yang, Jie Wen, Chao-Kai Xia, Shuqiang Li, Xiao Jin, Shi Southeast University National Mobile Communications Research Laboratory Nanjing210096 China Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Frontiers Science Center for Mobile Information Communication and Security Nanjing210096 China Institute of Communications Engineering National Sun Yat-sen University Kaohsiung80424 Taiwan Zte Corporation Shenzhen518055 China State Key Laboratory of Mobile Network and Mobile Multimedia Shenzhen518055 China Southeast University National Mobile Communications Research Laboratory Frontiers Science Center for Mobile Information Communication and Security Nanjing210096 China

The millimeter-wave (mmWave) communication technology, which employs large-scale antenna arrays, enables inherent sensing capabilities. Simultaneous localization and mapping (SLAM) can utilize channel multipath angle estimates to realize integrated sensing and communication design in 6G communication systems. However, existing works have ignored the significant overhead required by the mmWave beam management when implementing SLAM with angle estimates. This study proposes a joint beam management and SLAM design that utilizes the strong coupling between the radio map and channel multipath for simultaneous beam management, localization, and mapping. In this approach, we first propose a hierarchical sweeping and sensing service design. The path angles are estimated in the hierarchical sweeping, enabling angle-based SLAM with the aid of an inertial measurement unit (IMU) to realize sensing service. Then, feature-aided tracking is proposed that utilizes prior angle information generated from the radio map and IMU. Finally, a switching module is introduced to enable flexible switching between hierarchical sweeping and feature-aided tracking. Simulations show that the proposed joint design can achieve sub-meter level localization and mapping accuracy (with an error © 1972-2012 IEEE.

关键词： Mapping

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A robust TDOA based solution for source location using mixed Huber loss

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1375-1380页

作者： YOU Mingyi LU Annan Science and Technology on Communication Information Security Control Laboratory No.36 Research Institute of China Elec-tronics Technology Group CorporationJiaxing 314033China No.36 Research Institute of China Electronics Technology Group Corporation Jiaxing 314033China

This paper proposes a source localization solution robust to measurement outliers in time differences of arrivals(TDOA)*** solution uses a piecewise loss function named as mixed Huber loss(MHL)proposed based on the classical Huber loss(HL)and its refined *** MHL is able to effectively mitigate the impact of all levels of measurement outliers by setting two triggering *** practice,appropriate triggering threshold values can be obtained through simulation given the level of measurement noise and a rough range of potential measurement outliers.A clustering based approach is proposed to further improve the robustness of localization solution against reference sensor related *** are included to examine the solution's performance and compare it with several *** proposed MHL based solution is shown to be superior to the classical solution and the *** solution is shown to be even robust to multiple measurement ***,the influence of range measurement outliers in the reference sensor can be effectively mitigated by the clustering based approach.

关键词： time differences of arrivals(TDOA) robust localization Huber loss(HL) outlier mitigation

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Analysis and Simulation of Interference Effects on CSK Modulation Systems 15

Analysis and Simulation of Interference Effects on CSK Modul...

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15th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2022

作者： Guan, Lele Xu, Zhan Tian, Lu Shi, Chenrui School of Information and Communication Engineering Beijing Information Science and Technology University Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing China

ISBN: (数字)9781665488877

ISBN: (纸本)9781665488877

As the space environment of information transmission becomes more and more complex, the accuracy of communication becomes a new challenge. In order to study the anti-jamming performance of code shift keying (CSK), this paper mainly simulates the performance of CSK and binary phase shift keying (BPSK) under 5 signal interferences, and discusses it according to the bit error rates (BER) obtained by simulation. In the face of different forms of signal interference, CSK has better anti-jamming performance than BPSK. Under various forms of signal interference, CSK has the strongest anti-interference ability to multi-tone interference, and its anti-interference ability to pulse interference, 50% narrowband interference, single-tone interference and channel noise decreases successively. © 2022 IEEE.

关键词： Binary phase shift keying

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Dynamic Unmanned Aerial Vehicle Selection via Evolutionary Game

Dynamic Unmanned Aerial Vehicle Selection via Evolutionary G...

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2023 IEEE/CIC International Conference on communications in China, ICCC 2023

作者： Meng, Anqi Ren, Tianshi Yang, Mei Gao, Xiaozheng Zhang, Xianchao Zhang, Jinbo Beijing Information Science and Technology University Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing China Beijing Information Science and Technology University Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing China Beijing Institute of Technology School of Information and Electronics Beijing China Beijing Institute of Fashion Technology School of Arts and Sciences Beijing China Jiaxing University Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province Jiaxing China The 54th Research Institute of Cetc Science and Technology on Communication Networks Laboratory Shijiazhuang China

ISBN: (纸本)9798350345384

Unmanned aerial vehicle assisted (UAV-assisted) wireless communication network is a promising paradigm of wireless communication network. In this paper, we apply the evolutionary game to the UAV selection process of ground user equipment (UE). Specifically, we first establish a UAV-assisted uplink wireless communication model, and then we use replicator dynamics to describe the process of evolution game. Finally, we propose a dynamic UAV selection algorithm based on evolutionary game with low computation complexity. The numerical results prove the effectiveness of our developed algorithm in UAV-assisted wireless communication network. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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