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3rd EAI International Conference on Artificial Intelligence for communications and Networks, AICON 2021

作者： Qian, Jiachuan Li, Haijie Zhu, Huijie Science and Technology on Communication Information Security Control Laboratory Jiaxing314033 China The 36th Research Institute of China Electronics Technology Group Corporation Jiaxing314033 China Huaxin Consulting and Designing Institute Co. Ltd. Hangzhou China

ISBN: (纸本)9783030901950

This paper introduces the target localization experiment using the digital television terrestrial broadcasting (DTMB) signal. Firstly, the feasibility and advantages of DTMB signal as an external illumination source signal are analyzed. Then the ambiguity function of DTMB signal is analyzed, as well as its distance and Doppler resolution. ECA algorithm is introduced to suppress direct wave and multipath clutter. In order to obtain the positioning results of target, the array antenna is used as the direction-finding antenna to measure the azimuth angle of target. Finally, the target localization experiment based on DTMB signal is designed, and the localization information of target is determined by combining the actual position of TV Tower and receiver in two dimensions. © 2021, ICST Institute for Computer sciences, Social Informatics and Telecommunications Engineering.

关键词： Clutter (information theory)

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SVD-based denoising algorithm for TH-PPM UWB signal in AWGN channel

SVD-based denoising algorithm for TH-PPM UWB signal in AWGN ...

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IEEE International Conference on communication Software and Networks

作者： Xu, Jianmin Wang, Yufeng Science and Technology on Communication Information Security Control Laboratory Jiaxing Zhejiang Province 314033 China Jiangnan Electronic and Communications Research Institute Jiaxing Zhejiang province 314033 China

ISBN: (纸本)9781612844855

In this paper, a novel denoising technique based on singular value decomposition (SVD) algorithm for a UWB system with Time hopping (TH) and pulse position modulation (PPM) are considered is presented. According to the different correlation about UWB signals and Gaussian noises themselves, SVD is used to approximate the noises which then are subtracted from the received signals. Aiming at shortcomings of existing singular value truncation criterion, this paper use a new method to decide the threshold for SVD filter (SVDF), based on the value of signal to noise ratio (SNR). Simulations have demonstrated that an efficient elimination of noise on UWB signal and an improvement on Bit error rate (BER) are achieved by comparing our algorithm with the EMD method. © 2011 IEEE.

关键词： Singular value decomposition

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A novel parameter extracting method for composite right/left-handed structure

A novel parameter extracting method for composite right/left...

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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

作者： Chen, Wan Fu, Jiahui Hua, Jun Chen, Meiliang Dep. of Electronics and Communication Engineering Harbin Institute of Technology 92 Xidazhi St. Harbin China Science and Technology on Communication Information Security Control Laboratory 3288 Zhongshanxi St. Jiaxing Zhejiang Province China

ISBN: (纸本)9781467313032

In this paper, a novel approach is presented to calculate the lumped parameters of right/left-handed Structures. By this method, the equivalent circuit can be extracted, and the left/right handed features can be certified. Furthermore, the propagation constant of periodic structures can fit well with simulation and measurement. © 2012 IEEE.

关键词： Equivalent circuits

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A novel left-handed circularly polarized votage-controlled leaky wave antenna

A novel left-handed circularly polarized votage-controlled l...

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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

ISBN: (纸本)9781467313032

In this literature, a novel left-handed circularly polarized voltage-controlled leaky wave antenna is presented with a scanning range of 0° to -37° with a perfect axial ratio at the most time below 2 dB. The structure depends on CRLH (Composite Right/Left Handed) transmission line with a cross finger coupled line added, which gives additional performance on the farfield axial ratio. Also the principle of the structure is discussed and an equivalent circuit is presented for further study. © 2012 IEEE.

关键词： Equivalent circuits

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Specific primary user sensing for wireless security in IEEE 802.22 network

Specific primary user sensing for wireless security in IEEE ...

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International Symposium on communications and information Technologies (ISCIT)

作者： Zhenxing Luo Caiyi Lou Shichuan Chen Shilian Zheng Shaowei Li Science and Technology on Communication Information Security Control Laboratory Jiaxing China

Cognitive Radio (CR) is considered as an effective technology for alleviating the spectrum shortage problem by enabling secondary users to utilize vacant spectrum allocated to a primary user (PU). IEEE 802.22 which is the first standard based on CR is developed to increase the efficiency of TV bands. However the physical layer security of IEEE 802.22 has been studied rarely. In this paper, we propose a scheme to sense the specific primary user for dealing with Primary User Emulation (PUE) Attack which is a possible threat to wireless security. According to ATSC digital TV which is one of the important PUs, we estimate the accuracies of pilot and symbol rate as RF fingerprint (RFF), and Support Vector Data Description (SVDD) is introduced to sense the fine differences of RFF to distinguish PUE attacker from PU. The simulation results show that the proposed scheme is feasible to verify the PUE attacker at a relative high SNR level.

关键词： Signal to noise ratio Training Radio frequency Sensors Accuracy Fingerprint recognition

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Joint Delay and Maintenance Optimization for Spectrum Handoff in Cognitive Radio Networks Using Binary Shuffled Frog Leaping Algorithm

Joint Delay and Maintenance Optimization for Spectrum Handof...

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International Conference on communication technology (ICCT)

作者： Jianjun Jiang Shilian Zheng Science and Technology on Communication Information Security Control Laboratory Jiaxing China

In cognitive radio networks, when a primary user reoccupies the channel, cognitive radios (CRs) need to vacate the channel and reestablish a link on some other channel to avoid interference to primary users, resulting in spectrum handoff. A joint spectrum handoff delay and link maintenance optimization problem for spectrum handoff is formulated in this paper. A binary shuffled frog leaping algorithm (SFLA) based algorithm is proposed to solve this problem. Simulations show that the proposed algorithm performs far better than random target channel visiting scheme. It can obtain solutions with low handoff delay and low probability of handoff failure which are very close to the optimal solutions.

关键词： Delays Maintenance engineering Optimization Memetics Switches Sociology Statistics

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Wideband spectrum sensing in modulated wideband converter based cognitive radio system

Wideband spectrum sensing in modulated wideband converter ba...

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International Symposium on communications and information Technologies (ISCIT)

作者： Shilian Zheng Xiaoniu Yang Science and Technology on Communication Information Security Control Laboratory Jiaxing China

Wideband spectrum sensing is a fundamental problem in cognitive radio networks. In this paper, a wideband spectrum sensing procedure which consists of four steps, i.e., coarse support recovery, fine binary detection, band edges detection and clustering, for modulated wideband converter (MWC) based cognitive radio system at sub-Nyquist rate is proposed. Simulations show that with a sub-Nyquist sampling rate, the proposed spectrum sensing procedure can locate spectrum holes correctly.

关键词： Wideband Sensors Narrowband Cognitive radio Image edge detection Compressed sensing

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Distributed consensus algorithms for decision fusion based cooperative spectrum sensing in cognitive radio

Distributed consensus algorithms for decision fusion based c...

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International Symposium on communications and information Technologies (ISCIT)

作者： Shilian Zheng Xiaoniu Yang Caiyi Lou Science and Technology on Communication Information Security Control Laboratory Jiaxing China

Spectrum sensing is one of the fundamental problems for cognitive radio. In cognitive radio networks, cognitive radios can cooperatively sense the spectrum to detect the presence of primary users with higher sensitivity. This paper proposes distributed consensus algorithms for decision fusion based cooperative spectrum sensing. Both theoretical analysis and simulations are performed to show the convergence property of the algorithms. Results show that the proposed algorithms can realize central OR, AND, and M-out-of-n decision fusion rules by locally exchanging information among each radio and its adjacent neighbors in a distributed way.

关键词： Sensors Cognitive radio Convergence Network topology Algorithm design and analysis FCC Topology

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Video Stabilization via Prediction with Time-Series Network and Image Inpainting with Pyramid Fusion

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Chinese Journal of Electronics 2021年第6期30卷 1103-1110页

作者： CHENG Keyang LI Shichao RONG Lan WANG Wenshan SHI Wenxi ZHAN Yongzhao School of Computer Science and Communication Engineering Jiangsu University Jiangsu Province Big Data Ubiquitous Perception and Intelligent Agricultural Application Engineering Research Center Cyber Space Security Academy of Jiangsu University National Engineering Laboratory for Public Safety Risk Perception and Control by Big Data Xinjiang Lianhaichuangzhi Information Technology Co. Ltd.

Due to the poor filling effect of the video image defect commonly used in the video stabilization field, the video is seemed still unstable after the image stabilization process, which seriously affects the visual effect. To solve this problem, we improve a video stabilization method based on time-series network prediction and pyramid fusion restoration is proposed to optimize the visual effect after image *** flow of the proposed method is as follows: First,it is adaptive to determine whether the defect of the corresponding frame at the current time needs padding inpainting. Then, for the frame that needs to be inpainting,the frames generated before the current moment are sent to the model combining the convolutional neural networks and the gate recurrent unit to predict the part to be filled. Next the current defect image and the complete image to be filled are brought into the Laplacian pyramid reconstruction, and the improved weighted optimal suture is introduced for splicing during the fusion. Finally, the video frame is cut after reconstruction. The method is tested on a data set composed of videos commonly used in the field of video stabilization. The experimental results show that the average peak signal to noise ratio of the method is 2 to 5 d B higher than that of the comparison algorithm, and the average structural similarity index is improved by about 2% to 7% compared with the contrast algorithm.

关键词： image restoration image sequences video frame cutting improved weighted optimal suture gate recurrent unit video signal processing video stabilization method image fusion Laplacian pyramid reconstruction padding inpainting image resolution neural nets convolutional neural networks video image defect pyramid fusion restoration image inpainting visual effect optimization image reconstruction time-series network prediction image stabilization process

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Research on Covariance Matrix and Freedom Degree of GNSS Anti-jamming Array

Research on Covariance Matrix and Freedom Degree of GNSS Ant...

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IEEE International Conference on Signal and Image Processing (ICSIP)

作者： Pulong Nan Lijun Wang Gaofeng Pan Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781665446006

The paper focuses on the covariance matrix and freedom degree widely involved in array anti-jamming processing. Based on the eigen decomposition of array covariance matrix of received signals, the correlation properties as well as the relationship between eigenvalue distribution of covariance matrix and consumed freedom degrees of array are researched and analyzed, with GNSS anti-jamming array taken as an example. Simulation experiments are done to explain a number of representative conditions and help summarize several deploying instructions for the platforms carrying anti-jamming arrays, so as to avoid freedom degrees being consumed much and ensure the anti-jamming capabilities.

关键词： Global navigation satellite system Correlation Array signal processing Image processing Conferences Parallel processing Eigenvalues and eigenfunctions

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