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Radar based assisted living has received great amount of research interest in recent years. By employing the micro-Doppler features of indoor human motions, accurate recognition and classification of different types of movements become…

Signal Processing · Electrical Eng. & Systems 2020-01-30 Qiang An , Shuoguang Wang , Wenji Zhang , Hao Lv , Jianqi Wang , Shiyong Li , Ahmad Hoorfar

The radar signal processing algorithm is one of the core components in through-wall radar human detection technology. Traditional algorithms (e.g., DFT and matched filtering) struggle to adaptively handle low signal-to-noise ratio echo…

Signal Processing · Electrical Eng. & Systems 2024-03-26 Wei Wang , Naike Du , Yuchao Guo , Chao Sun , Jingyang Liu , Rencheng Song , Xiuzhu Ye

Through-the-Wall radar (TWR) human activity recognition (HAR) is a technology that uses low-frequency ultra-wideband (UWB) signal to detect and analyze indoor human motion. However, the high dependence of existing end-to-end recognition…

Signal Processing · Electrical Eng. & Systems 2024-10-11 Weicheng Gao , Xiaodong Qu , Xiaopeng Yang

We propose a multi-resolution convolutional autoencoder (MrCAE) architecture that integrates and leverages three highly successful mathematical architectures: (i) multigrid methods, (ii) convolutional autoencoders and (iii) transfer…

Machine Learning · Computer Science 2020-04-13 Yuying Liu , Colin Ponce , Steven L. Brunton , J. Nathan Kutz

The detection of multiple targets in an enclosed scene, from its outside, is a challenging topic of research addressed by Through-the-Wall Radar Imaging (TWRI). Traditionally, TWRI methods operate in two steps: first the removal of wall…

Applications · Statistics 2023-07-25 Hugo Brehier , Arnaud Breloy , Chengfang Ren , Guillaume Ginolhac

We propose the Motion Capsule Autoencoder (MCAE), which addresses a key challenge in the unsupervised learning of motion representations: transformation invariance. MCAE models motion in a two-level hierarchy. In the lower level, a…

Computer Vision and Pattern Recognition · Computer Science 2021-10-04 Ziwei Xu , Xudong Shen , Yongkang Wong , Mohan S Kankanhalli

The majority of human detection methods rely on the sensor using visible lights (e.g., RGB cameras) but such sensors are limited in scenarios with degraded vision conditions. In this paper, we present a multimodal human detection system…

Computer Vision and Pattern Recognition · Computer Science 2023-07-10 Kaiwen Cai , Qiyue Xia , Peize Li , John Stankovic , Chris Xiaoxuan Lu

High-dimensional data, particularly in the form of high-order tensors, presents a major challenge in self-supervised learning. While MLP-based autoencoders (AE) are commonly employed, their dependence on flattening operations exacerbates…

Machine Learning · Computer Science 2025-08-12 Junjing Zheng , Chengliang Song , Weidong Jiang , Xinyu Zhang

Through-the-wall radar (TWR) human activity recognition can be achieved by fusing micro-Doppler signature extraction and intelligent decision-making algorithms. However, limited by the insufficient priori of tester in practical indoor…

Signal Processing · Electrical Eng. & Systems 2024-10-11 Xiaopeng Yang , Weicheng Gao , Xiaodong Qu , Haoyu Meng

Millimeter-wave radar is promising to provide robust and accurate vital sign monitoring in an unobtrusive manner. However, the radar signal might be distorted in propagation by ambient noise or random body movement, ruining the subtle…

Signal Processing · Electrical Eng. & Systems 2025-05-07 Yuanyuan Zhang , Rui Yang , Yutao Yue , Eng Gee Lim

Objectives: To develop a joint k-TE reconstruction algorithm to reconstruct the T2-weighted (T2W) images and T2 map simultaneously. Materials and Methods: The joint k-TE reconstruction model was formulated as an optimization problem subject…

Medical Physics · Physics 2023-01-13 Yan Dai , Xun Jia , Yen-Peng Liao , Jiaen Liu , Jie Deng

The scarcity of annotated data in LiDAR point cloud understanding hinders effective representation learning. Consequently, scholars have been actively investigating efficacious self-supervised pre-training paradigms. Nevertheless, temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Weijie Wei , Fatemeh Karimi Nejadasl , Theo Gevers , Martin R. Oswald

End-to-end (E2E) multi-channel ASR systems show state-of-the-art performance in far-field ASR tasks by joint training of a multi-channel front-end along with the ASR model. The main limitation of such systems is that they are usually…

Audio and Speech Processing · Electrical Eng. & Systems 2021-09-24 Marco Gaudesi , Felix Weninger , Dushyant Sharma , Puming Zhan

Text-Motion Retrieval (TMR) aims to retrieve 3D motion sequences semantically relevant to text descriptions. However, matching 3D motions with text remains highly challenging, primarily due to the intricate structure of human body and its…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Junlong Ren , Gangjian Zhang , Honghao Fu , Pengcheng Wu , Hao Wang

Neural networks are capable of learning powerful representations of data, but they are susceptible to overfitting due to the number of parameters. This is particularly challenging in the domain of time series classification, where datasets…

Machine Learning · Computer Science 2022-01-28 Hong Yang , Travis Desell

Cross-modality magnetic resonance (MR) image synthesis can be used to generate missing modalities from given ones. Existing (supervised learning) methods often require a large number of paired multi-modal data to train an effective…

Image and Video Processing · Electrical Eng. & Systems 2023-06-21 Yonghao Li , Tao Zhou , Kelei He , Yi Zhou , Dinggang Shen

With the exponential growth of multimedia data, leveraging multimodal sensors presents a promising approach for improving accuracy in human activity recognition. Nevertheless, accurately identifying these activities using both video data…

Computer Vision and Pattern Recognition · Computer Science 2024-08-09 Rex Liu , Xin Liu

Manifold learning using deep neural networks been shown to be an effective tool for building sophisticated prior image models that can be applied to noise reduction in low-dose CT. We propose a new iterative CT reconstruction algorithm,…

Medical Physics · Physics 2020-10-20 Matthew Tivnan , J. Webster Stayman

In the field of emotion recognition and Human-Machine Interaction (HMI), personalised approaches have exhibited their efficacy in capturing individual-specific characteristics and enhancing affective prediction accuracy. However,…

Machine Learning · Computer Science 2024-04-16 Munachiso Nwadike , Jialin Li , Hanan Salam

Existing anomaly detection methods for Wireless Sensor Networks (WSNs) generally suffer from insufficient extraction of spatio-temporal correlation features, reliance on either timedomain or frequencydomain information alone, and high…

Networking and Internet Architecture · Computer Science 2026-04-28 Miao Ye , Ziheng Wang , Qiuxiang Jiang , Xingsi Xue , Wenxi Liu , Yu Ning , Cheng Zhu
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