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2021 International Conference on Networking and Network Applications, NaNA 2021

作者： Tianyi, Liang Huijie, Zhu Science and Technology on Communication Information Security Control Laboratory Jiaxing314033 China No.36 Research Institute of China Electronics Technology Group Corporation Jiaxing314033 China

ISBN: (纸本)9781665441582

In the 5th Generation Mobile communication technology (5G) system, physical downlink control channel (PDCCH) controls the transmission and reception of uplink and downlink data by transmitting Downlink control information (DCI), which is the core of the physical channel control of the 5G system. Obtain the DCI information to obtain the uplink and downlink scheduling information of the signal, thereby providing more possibilites for effectively interfering with the mobile signal. In this paper, by studying the signal transmitting end, the corresponding resource demapping, deinterleaving, decoding and other algorithms are used to realize the full link processing of the receiving end and obtain DCI information. The actual 5G signal collected is processed, which verifies the reliability and accuracy of the algorithm. © 2021 IEEE.

关键词： 5G mobile communication systems

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Research on Space-Time Block Code technology in MIMO System 7

Research on Space-Time Block Code Technology in MIMO System

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7th International Conference on Computer and communications, ICCC 2021

作者： Pan, Conglin Chen, Si Wu, Wei Qian, Jiachuan Wang, Lijun No.36 Research Institute of CETC Science and Technology On Communication Information Security Control Laboratory Jiaxing China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9781665409506

MIMO technology has been widely used in the telecommunication systems nowadays, and the space-time coding is a key part of MIMO technology. A good coding scheme can exploit the spatial diversity to correct the error which is generated in transmission, and increase the normalized transfer rate with low decoding complexity. On the Basis of the research on different Space-Time Block Codes, this essay proposes a new STBC, Diagonal Block Orthogonal Space-Time Block Code. Then we will compare it with other STBCs in the performance of bit error rate, transfer rate, decoding complexity and peek-to-average power ratio, the final result will prove the superiority of DBOAST. © 2021 IEEE.

关键词： MIMO systems

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The Anti-Interference Algorithm of BPSK Spread Spectrum Signal Based on Generative Adversarial Networks 7

The Anti-Interference Algorithm of BPSK Spread Spectrum Sign...

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7th International Conference on Signal and Image Processing, ICSIP 2022

作者： Han, Yu Zhang, Minghong Shen, Lei Wang, Lijun The 36th Research Institute of China Electronics Technology Group Corporation Science and Technology on Communication Information Security Control Laboratory Jiaxing China Hangzhou Dianzi University School of Communication Engineering Hangzhou China

ISBN: (数字)9781665495639

ISBN: (纸本)9781665495639

In order to avoid the problem of unsatisfactory anti-jamming effect when the interference feature extraction of traditional anti-jamming algorithm is inaccurate, this paper takes BPSK spread spectrum signal as the research object, and proposes an anti-jamming algorithm for BPSK spread spectrum signal based on generative adversarial network. The algorithm firstly despreads the spread spectrum signal, and then images the despread signal, and uses the known disturbed despread signal set and undisturbed signal set for network training. The mapping relationship between the disturbed despread signal image and the undisturbed despread signal image is constructed by generative adversarial network, so as to achieve the purpose of interference suppression. Experiments show that the signal anti-jamming algorithm based on generative adversarial network proposed in this paper has better interference suppression ability than the frequency-domain notch anti-jamming algorithm under multi-tone interference and narrow-band noise interference. © 2022 IEEE.

关键词： Frequency domain analysis

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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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Radio Signal Modulation Pattern Recognition Based on Time-Frequency Adaptive Decomposition and Hybrid Neural Network

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IEEE Internet of Things Journal 2025年

作者： Dai, Shaogang Xu, Jianwei Zhou, Huaji Hangzhou Dianzi University School of communication engineering Hangzhou310018 China Science and Technology on Communication Information Security Control Laboratory Jiaxing314000 China

Automatic modulation classification of electromagnetic signals has an important role in the field of signal processing. The current methods for identifying the modulation pattern of radio signals mainly used end-to-end neural network models, which suffered from the problems such as network redundancy and non-interpretability. In order to solve the above problems, this paper proposes a radio signal modulation pattern recognition method based on time-frequency adaptive decomposition and hybrid neural network. The discrete wavelet decomposition is used to decompose the original radio signals into adaptive high and low frequencies. Then feed the resulting high and low frequency portions into a multi-channel hybrid neural network (MHNN) for training to obtain the classification results. In the discrete wavelet decomposition process, the number of decomposition layers and the decomposition threshold are determined adaptively according to the difference of SNRs. In the design of multi-path hybrid neural network structure, the signal characteristics of high and low frequency parts are considered comprehensively. The network channels with different convolutional kernel scales and different layers are constructed to reduce the number of model parameters and training time while ensuring the classification accuracy. Using RadioML2016.10a dataset for experiments, the recognition accuracy of MHNN is prior to the end-to-end deep learning methods, which can achieve the accuracy of 92.30% and the F1 of 91.84% when SNR=2dB. It shows that the proposed radio signal modulation pattern recognition method based on the time-frequency adaptive decomposition and hybrid neural network can balance the accuracy and lightweight. Moreover, it has certain interpretability for the original input data, distinguishing the main body and details of the signal by dividing the signal into high and low frequencies, which provides a new idea for the interpretability of deep convolutional neural networks. ©

关键词： Signal modulation

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Detection of PFCP Protocol Based on Fuzz Method 2

Detection of PFCP Protocol Based on Fuzz Method

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2nd International Conference on Computer, control and Robotics, ICCCR 2022

作者： Cao, Yebei Chen, Yucheng Zhou, Wenan Science and Technology on Communication Information Security Control Laboratory Jiaxing China School of Computer Science Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781665466745

5G as a widely used mobile network, its security is of great significance. PFCP protocol is one of the important protocols that introduced into 5G core network, After the analysis of PFCP protocol and its security threat, this paper profoundly fuzzed the PFCP protocol. In order to improve the efficiency, this paper improves the random Fuzzing test technology, proposes a new data mutation algorithm and frame. By analyzing the test results, we found that the application of the new algorithm made the fuzzing technology greatly improved in terms of efficiency and found security vulnerabilities. © 2022 IEEE.

关键词： Efficiency

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A Latency-offset Online Trajectory Planner based on Successive Convex Approximation

A Latency-offset Online Trajectory Planner based on Successi...

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2022 IEEE International Conference on Unmanned Systems, ICUS 2022

作者： Li, Yiming Jiang, Bin Yang, Junan Wang, Jian Li, Beibei Huang, Keju Shao, Kun College of Electronic Engineering National University of Defense Technology Hefei China Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (数字)9781665484565

ISBN: (纸本)9781665484565

An online trajectory planner permits autonomous unmanned vehicles to maneuver in a changing mission scenario and varying environment. However, in real-time online plannings, task performance, completeness and accuracy is seriously challenged by the latency during mission planning and scheme computation. To address the issue, we propose a latency-correcting online trajectory planner based on successive convex approximation (SCA), which is aiming at offset the latency in the planning. In this work, two types of latency are considered, i.e., a prior known variable and computation, where the latter one poses a problem. With this, we devise an online latency method to predict computing latency by conducting time complexity analysis. The experiment is to design an optimal UAV trajectory to serve the eavesdropping of an uncooperative emitter. The results showed this harmful latency effect, and then demonstrated the improved accuracy and task performance of the proposed planner. © 2022 IEEE.

关键词： Trajectories

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Simultaneous Localization and Recognition of Subwavelength Non-Cooperative Entities Based on SISO Time Reversal and Neural Networks

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IEEE Sensors Journal 2024年

作者： Wang, Yinchen Duan, Yu Ye, Yuqi Wang, Ren Li, Biao Jiang, Bin Liu, Xin Wang, Bing-Zhong University of Electronic Science and Technology of China Institute of Applied Physics Chengdu611731 China No. 36 Research Institute of CETC Communication Information Security Control Laboratory Jiaxing314033 China

The simultaneous localization and recognition of subwavelength non-cooperative entities within complex multi-scattering environments using a simplified system continues to pose a substantial challenge. In this paper, we address this challenge by synergistically integrating time reversal time-frequency phase prints (TRTFPPs) and neural networks. Initially, a time reversal (TR) single-input single-output (SISO) framework is employed to generate TRTFPPs. Subsequently, neural networks are employed to comprehend the TRTFPPs. Specifically, a cascaded neural network structure is embraced, encompassing both a recognition neural network and distinct neural networks for localizing different entities. Using the devised method, we have achieved the simultaneous subwavelength recognition and localization through numerical simulations for metallic entities and experimental testing for metallic and non-metallic entities. The proposed methodology holds applicability across various electromagnetic systems, including but not limited to detection, imaging, human-computer interaction, and the Internet of Things (IoT). © 2001-2012 IEEE.

关键词： Multiple scattering

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Research on Covariance Matrix and Freedom Degree of GNSS Anti-jamming Array 6

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

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6th International Conference on Signal and Image Processing, ICSIP 2021

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

ISBN: (纸本)9780738133737

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. © 2021 IEEE.

关键词： Covariance matrix

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Phased Array Full-Duplex for Concurrent Multifunction: Architecture and Implementation 13

Phased Array Full-Duplex for Concurrent Multifunction: Archi...

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13th International Conference on Microwave and Millimeter Wave technology, ICMMT 2021

作者： Chen, Shunyang Chen, Jiarui Huang, Xiaoguo Chen, Linglu Zhang, Qi Chen, Binhui Zhu, Menglei Science And Technology On Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781665434379

In this article, the realization of concurrent multifunction in phased array full-duplex platforms is discussed. For modern complex electromagnetic environment, an efficient architecture is needed to accomplish the concurrent working of several different functions, such as communication, radar, spectrum sensing and so on. First, we establish a novel architecture based on the phased array system to effectively incorporate current approaches useful for realizing concurrent multifunction. Then, a prototype implementation based on multi-objective beamforming is proposed to demonstrate the role of digital methods in cancelling self-interferenc. Finally, simulation and experimental results are exhibited to prove the result of the proposed method. © 2021 IEEE.

关键词： Architecture

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