Iet Radar Sonar and Navigation最新文献_第6页

Multi-target cognitive electronic reconnaissance for unmanned aerial vehicles based on scene reconstruction 基于场景重构的无人机多目标认知电子侦察

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-12-06 DOI: 10.1049/rsn2.12668

Yun Zhang, Shixun You, Yunbin Yan, Qiaofeng Ou, Jie Liu, Ling Chen, Xiang Zhu

{"title":"Multi-target cognitive electronic reconnaissance for unmanned aerial vehicles based on scene reconstruction","authors":"Yun Zhang, Shixun You, Yunbin Yan, Qiaofeng Ou, Jie Liu, Ling Chen, Xiang Zhu","doi":"10.1049/rsn2.12668","DOIUrl":"https://doi.org/10.1049/rsn2.12668","url":null,"abstract":"Model-free deep reinforcement learning (DRL) is regarded as an effective approach for multi-target cognitive electronic reconnaissance (MCER) missions. However, DRL networks with poor generalisation can significantly reduce mission completion rates when parameters such as reconnaissance area size, target number, and platform speed vary slightly. To address this issue, this paper introduces a novel scene reconstruction method for MCER missions and a mission group adaptive transfer deep reinforcement learning (MTDRL) algorithm. The algorithm enables quick adaptation of reconnaissance strategies for varied mission scenes by transferring strategy templates and compressing multi-target perception states. To validate the method, the authors developed a transfer learning model for unmanned aerial vehicle (UAV) MCER. Three sets of experiments are conducted by varying the reconnaissance area size, the target number, and the platform speed. The results show that the MTDRL algorithm outperforms two commonly used DRL algorithms, with an 18% increase in mission completion rate and a 5.49 h reduction in training time. Furthermore, the mission completion rate of the MTDRL algorithm is much higher than that of a typical non-DRL algorithm. The UAV demonstrates stable hovering and repeat reconnaissance behaviours at the radar detection boundary, ensuring flight safety during missions.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2667-2680"},"PeriodicalIF":1.4,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12668","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-field scattering centre modelling for complex targets 复杂目标近场散射中心建模

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-12-04 DOI: 10.1049/rsn2.12667

Yanxi Chen, Kunyi Guo, Zhouyang Liu, Xinqing Sheng

{"title":"Near-field scattering centre modelling for complex targets","authors":"Yanxi Chen, Kunyi Guo, Zhouyang Liu, Xinqing Sheng","doi":"10.1049/rsn2.12667","DOIUrl":"https://doi.org/10.1049/rsn2.12667","url":null,"abstract":"The parametric scattering centre (SC) model of the target has been widely used in the rapid simulation of radar image. Most of the existing SC models are suitable for far-field scattering where the radar cross section (RCS) is independent of the distance from the target to the radar. However, when the electromagnetic scattering of the target is in the near-field region of radiation, the RCS of the target changes dramatically in distance. The existing SC model cannot characterise these important near-field characteristics. In this paper, the near-field model with the dependence description of the SC on the distance is proposed. Firstly, the scattering characteristics of several main geometric structures of the extended target in the near-field radiation region are analysed. Then, on the basis of far-field SC model expressions, the description of the relationship between amplitude and phase of the SC model and distance is added. Finally, the correctness of the near-field SC model is verified by comparing with the accurate full-wave numerical method. In order to further illustrate the practicability of the near-field SC model, an actual aircraft target is used. The results proved that the near-field SC model has the advantages of high accuracy and high computational efficiency.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2657-2666"},"PeriodicalIF":1.4,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12667","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel approach to simulate moving targets in automotive radar applications 汽车雷达中运动目标模拟的新方法

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-12-03 DOI: 10.1049/rsn2.12679

Linyan Zhang, Chengfa Xu, Haiqing Jiang, Wulong Zhang

引用次数: 0

A belief propagation algorithm based on track-before-detect for tracking low-observable and manoeuvering targets using multiple sensors 一种基于检测前跟踪的多传感器低可观测机动目标的信念传播算法

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-30 DOI: 10.1049/rsn2.12673

Chenghu Cao, Haisheng Huang, Xin Li, Yongbo Zhao

{"title":"A belief propagation algorithm based on track-before-detect for tracking low-observable and manoeuvering targets using multiple sensors","authors":"Chenghu Cao, Haisheng Huang, Xin Li, Yongbo Zhao","doi":"10.1049/rsn2.12673","DOIUrl":"https://doi.org/10.1049/rsn2.12673","url":null,"abstract":"It is notoriously challenging work to track an unknown number of low-observable manoeuvering targets. In this paper, a sequential Bayesian inference method based on the multiple-model dynamic model and track-before-detect measurement (TBD) model is proposed for tracking low-observable manoeuvering targets using multiple sensors. The multiple-model dynamic model is capable to characterise the dynamic behaviour of manoeuvering targets. The TBD measurement model can completely capture an echo signal without any preprocessing, furtherly handling with low-observable targets. The authors’ proposed method is based on a new multi-sensor statistical model that allows targets to interact and contribute to more than one data cell for the pixeled image TBD approach. Based on the factor graph representing the multi-sensor statistical model, the marginal posterior densities are derived by performing the message passing equations of the proposed belief propagation algorithm for target detection and target state estimation. The simulation results validate that the computational complexity of our proposed multi-sensor BP-TBD algorithm scales in the number of sensor nodes and demonstrate that its performance is superior among the state-of-the-art multi-sensor TBD methods.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2698-2708"},"PeriodicalIF":1.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12673","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of phase centre variation on tropospheric delay in PPP-AR with low-cost global navigation satellite systems receiver and antenna 相位中心变化对低成本全球导航卫星系统接收机和天线PPP-AR对流层延迟的影响

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-30 DOI: 10.1049/rsn2.12677

Jizhong Wu, Xiaoying Wang, Hongyang Ma

{"title":"Effect of phase centre variation on tropospheric delay in PPP-AR with low-cost global navigation satellite systems receiver and antenna","authors":"Jizhong Wu, Xiaoying Wang, Hongyang Ma","doi":"10.1049/rsn2.12677","DOIUrl":"https://doi.org/10.1049/rsn2.12677","url":null,"abstract":"As low-cost global navigation satellite systems receiver and antenna become increasingly prevalent for water vapour monitoring, precise millimetre-level characterisation of instrument biases is crucial for maintaining measurement accuracy and reliability. This study examines the impact of phase centre variation (PCV) corrections on zenith wet delay (ZWD) accuracy in precise point positioning (PPP) solutions using low-cost systems. The results show that PCV corrections significantly improve ZWD estimation, reducing bias and RMS by 66% and 31% in ambiguity float PPP, and by 71% and 38% in ambiguity fixed PPP. In addition, integer ambiguity resolution offers no significant improvement in ZWD accuracy without PCV correction. When PCV corrections and ambiguity fixing are applied, low-cost receivers demonstrate ZWD estimates comparable to those of high-precision geodetic receivers, with a deviation of 0.2 mm and an RMS of 2 mm. However, variations in signal tracking and multipath suppression can still influence ambiguity fixing rates, resulting in slightly lower performance for low-cost receivers compared to their high-precision counterparts. The study concludes that deploying low-cost receivers with calibrated antennas offers a cost-effective approach to increasing the spatial resolution of atmospheric water vapour measurements, thereby enhancing weather monitoring and early warning systems, particularly for localised extreme weather events.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2737-2748"},"PeriodicalIF":1.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12677","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A method based on BRD/BRRD for moving target localisation with minimal transmitters 基于BRD/BRRD的最小发射机运动目标定位方法

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-27 DOI: 10.1049/rsn2.12663

Mingzhu Yan, Haihong Tao, Le Wang

{"title":"A method based on BRD/BRRD for moving target localisation with minimal transmitters","authors":"Mingzhu Yan, Haihong Tao, Le Wang","doi":"10.1049/rsn2.12663","DOIUrl":"https://doi.org/10.1049/rsn2.12663","url":null,"abstract":"During the procedure of three-dimensional (3D) moving target localisation in multistatic passive radar (MPR) system, conventional closed-form algorithms and their enhanced versions necessitate at least four transmitters to obtain unambiguous localisation, and they are prone to poor noise resistance. In this paper, based on multiple sets of bistatic range difference (BRD) and bistatic range rate difference (BRRD) measurements, an innovative closed-form algorithm is proposed which, combines an improved two-step weighted least squares (ITSWLS) using the Newton method (NM) to minimise the number of transmitters required for localization. In a 3D environment, this algorithm can precisely localise targets with merely three transmitters. Compared with the existing closed-form algorithms, this algorithm saves one transmitter resource, breaking through the constraints of traditional approaches. After theoretical analysis and simulation verification, in the presence of just three transmitters, the estimation accuracy of the algorithm for both near-field and far-field target parameters can reach the Cramér–Rao lower bound (CRLB) when the measurement noise is low. If an additional transmitter is incorporated, this algorithm has higher localization accuracy and better noise resistance compared to the elliptic localization (EL), TSWLS, ITSWLS, and Taylor algorithms.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2617-2629"},"PeriodicalIF":1.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12663","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ground moving target indication of polarimetric interferometric synthetic aperture radar using joint scattering vector 基于联合散射矢量的偏振干涉合成孔径雷达地面运动目标指示

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-24 DOI: 10.1049/rsn2.12671

Jing Xu, Long Cheng, Chunhui Yu, Shiwei Zhang

{"title":"Ground moving target indication of polarimetric interferometric synthetic aperture radar using joint scattering vector","authors":"Jing Xu, Long Cheng, Chunhui Yu, Shiwei Zhang","doi":"10.1049/rsn2.12671","DOIUrl":"https://doi.org/10.1049/rsn2.12671","url":null,"abstract":"Ground moving target indication (GMTI) plays a critical role in both civilian applications and military applications. The accuracy of complex images coregistration is a major factor for multichannel synthetic aperture radar (SAR) GMTI. Moreover, polarimetric interferometric SAR (PolInSAR) represents a growing strength in multi-function radar systems. In response to this, we propose a new SAR-GMTI approach tailored for the PolInSAR system. To address the deterioration in clutter suppression performance caused by the coregistration errors, we construct a joint scattering vector (JSV) for polarimetric SAR (PolSAR) by incorporating the neighbouring vectors of the central pixel. Subsequently, the covariance matrix of JSV is estimated and subjected to eigen-decomposed. Clutter suppression of the PolInSAR system for GMTI is performed using eigen-subspace projection, where the JSV is projected onto noise subspace. This method is robust against coregistration errors since all ground moving target information is encapsulated within the JSV. Furthermore, the improvement factors with different clutter backgrounds (by changing the signal-to-clutter-plus-noise-ratio, SCNR) are analysed. The effectiveness of the proposed JSV-based method is validated using simulated PolInSAR data.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2681-2697"},"PeriodicalIF":1.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12671","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Abnormal gait recognition with millimetre-wave radar based on perceptual loss and convolutional temporal autoencoder 基于感知损失和卷积时间自编码器的毫米波雷达异常步态识别

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-22 DOI: 10.1049/rsn2.12664

Peng Zhao, Ling Hong, Yu Wang

{"title":"Abnormal gait recognition with millimetre-wave radar based on perceptual loss and convolutional temporal autoencoder","authors":"Peng Zhao, Ling Hong, Yu Wang","doi":"10.1049/rsn2.12664","DOIUrl":"https://doi.org/10.1049/rsn2.12664","url":null,"abstract":"Walking is fundamental to normal human life. However, many people suffer from walking impairments due to various diseases that may severely affect their daily activities. Early detection of an abnormal gait can aid subsequent treatment and rehabilitation. This paper proposes a novel abnormal gait recognition method based on a perceptual loss convolutional temporal autoencoder (PLCTAE) network. It comprises upstream and downstream tasks, both of which utilise radar micro-Doppler spectrograms as inputs. The upstream task employs a convolutional autoencoder with the perceptual loss to encode and decode micro-Doppler spectrograms, achieving unsupervised pretraining and obtaining the initial parameters for the convolutional part of the PLCTAE. The downstream task fine-tunes the convolutional part of the PLCTAE through supervised training to extract spatial features from the micro-Doppler spectrograms and incorporates a bidirectional long short-term memory (BiLSTM) network to further extract temporal features, accomplishing the task of abnormal gait classification. The experimental results demonstrate that the proposed method achieves good classification performance on the self-established dataset which is collected by Texas Instruments' IWR6843ISK millimetre-wave radar and contains eight types of abnormal gaits. The generalisation performance is also validated on a public dataset from the University of Glasgow containing six types of human activities.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2630-2641"},"PeriodicalIF":1.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12664","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Guest Editorial: Electronic attack and protection for modern radar systems and radar networks 嘉宾评论：现代雷达系统和雷达网络的电子攻击和保护

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-22 DOI: 10.1049/rsn2.12666

Alessio Balleri, Dietmar Matthes, Lorenzo Lo Monte, Krzysztof Kulpa

{"title":"Guest Editorial: Electronic attack and protection for modern radar systems and radar networks","authors":"Alessio Balleri, Dietmar Matthes, Lorenzo Lo Monte, Krzysztof Kulpa","doi":"10.1049/rsn2.12666","DOIUrl":"https://doi.org/10.1049/rsn2.12666","url":null,"abstract":"It is our great pleasure to present you with this IET Radar, Sonar and Navigation special issue on “Electronic Attack and Protection for Modern Radar Systems and Radar Networks”. The recent development of fast digital to analogue converters (DACs) and analogue to digital converters (ADCs), field programmable gate arrays (FPGAs) and parallel computing has contributed to the development of modern radars that, at the same time, can also be more easily attacked using digital radio frequency memories (DRFMs). The development of passive and netted multiband, multistatic, multichannel radars has also changed the EW scenario significantly. Classical EA can be less effective against passive, multistatic and multichannel radars and, as a result, new methods and new technologies have to be developed for effective countermeasures. Multichannel and multistatic jammers have also started to play a role in the EW scene. The aim of this special issue was to gather some of the most recent work in this area. The result is a collection of 12 interesting and timely papers aiming to address current technical challenges in electronic warfare. The papers included in this collection covers areas around the more general electronic warfare context as well as address specific challenges of electronic attack and electronic protection as summarised below.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 11","pages":"2077-2080"},"PeriodicalIF":1.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12666","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel multi-target TBD scheme for GNSS-based passive bistatic radar 基于gnss的无源双基地雷达多目标TBD新方案

IF 1.4 4区管理学

Iet Radar Sonar and Navigation Pub Date : 2024-11-20 DOI: 10.1049/rsn2.12670

Tao Tang, Pengbo Wang, Peng Zhao, Hongcheng Zeng, Jie Chen

{"title":"A novel multi-target TBD scheme for GNSS-based passive bistatic radar","authors":"Tao Tang, Pengbo Wang, Peng Zhao, Hongcheng Zeng, Jie Chen","doi":"10.1049/rsn2.12670","DOIUrl":"https://doi.org/10.1049/rsn2.12670","url":null,"abstract":"Global Navigation Satellite System (GNSS)-based passive bistatic radar (PBR) systems hold promise for use as low-altitude surveillance mechanisms in critical urban and suburban zones, attributed to their low power consumption, good concealment, and worldwide reach. However, the increasing demand for airspace regulation presents challenges for multi-target tracking. Additionally, the limited power budget of GNSS signals results in low target SNR, restricting the detection range. Hence, a novel multi-target track-before-detect (TBD) scheme is proposed. This strategy employs a dual-channel coarse focusing (DCCF)-based cluster centroid extraction algorithm to identify potential target information in the range Doppler (RD) domain. Subsequently, a modified cardinalised probability hypothesis density (MCPHD) filter is utilised, enhanced with a birth target intensity estimation module assisted by Doppler and a trajectory management module, to accurately track multiple targets under conditions of low SNR. Simulation results and performance analysis using the Optimal Sub-pattern Assignment (OSPA) metric confirm the effectiveness of our approach. Furthermore, in a real-world experiment using the GPS L5 signal as an illuminator, the authors successfully processed experimental data to track a civil aircraft over 10 frames, demonstrating the practical applicability of the proposed method in GNSS-based PBR systems.","PeriodicalId":50377,"journal":{"name":"Iet Radar Sonar and Navigation","volume":"18 12","pages":"2497-2512"},"PeriodicalIF":1.4,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/rsn2.12670","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0