Results 41 to 50 of about 1,723 (181)

Fast heart rate extraction using CW Doppler radar with interpolated discrete Fourier transform algorithm

AIP Advances, 2020
Doppler radar-based fast heart rate (HR) extraction has great application potential in stress and emotion recognition, anxiety treatments, etc.
Zi-Kai Yang, Heping Shi, Sheng Zhao, Xiang-Dong Huang, Zhiwei Guan   +4 more
doaj   +1 more source

Machine Learning-Based Human Recognition Scheme Using a Doppler Radar Sensor for In-Vehicle Applications

Sensors, 2020
In this paper, we propose a Doppler spectrum-based passenger detection scheme for a CW (Continuous Wave) radar sensor in vehicle applications. First, we design two new features, referred to as an ‘extended degree of scattering points’ and a ‘different ...
Eugin Hyun, Young-Seok Jin, Jae-Hyun Park, Jong-Ryul Yang   +3 more
doaj   +1 more source

Smart Spread Spectrum Modulated Tags for Detection of Vulnerable Road Users with Automotive Radar

Sensors, 2023
In recent years, there has been a significant increase in the number of collisions between vehicles and vulnerable road users such as pedestrians, cyclists, road workers and more recently scooter riders, especially in urban streets. This work studies the
Antonio Lazaro, Marc Lazaro, Ramon Villarino, David Girbau   +3 more
doaj   +1 more source

Multi‐synergistic strategy for dual‐sensing conductive hydrogels capable of simultaneous strain and temperature monitoring

FlexMat, EarlyView.
In this study, a multicomponent synergistic strategy is utilized, which capitalizes on the “intersection” of multiple functional influencing factors to achieve the successful development of a multifunctional hydrogel. Through the construction of a unique three‐dimensional dynamic cross‐linked network, the material combines mechanical strength ...
Wei Li, Weidong Xu, Libing Yang, Wanyang Lin, Yu Chen, Lefei Li, Sitong Chen, Chan Zheng, Jianying Huang, Weilong Cai, Yuekun Lai   +10 more
wiley   +1 more source

Thin‐film lithium niobate photonics: Frontiers in millimeter‐wave and terahertz generation and integrated applications

InfoScience, EarlyView.
With the advancement of 6G communications, high‐precision radar, and advanced imaging technologies, there is a growing demand for compact, high‐performance light sources capable of generating high‐frequency radio waves (millimeter‐wave and terahertz waves). This article systematically introduces how to efficiently generate these high‐frequency waves on
Jianfeng Xiong, Zhenyu Wang, Xu Li, Guo Tang, Sizhe Wang, Jiyuan Huang, Guochao Wang, Shuhua Yan, Wenzhao Sun   +8 more
wiley   +1 more source

Analisa Penggunaan Sinyal Radar Bentuk Pulsa dan Gelombang Kontinyu untuk Target Bergerak dengan Model Clutter Terdistribusi Rayleigh

Jurnal Teknik ITS, 2013
Radar (Radio, Detection, and Ranging) mampu mendeteksi target untuk mendapatkan informasi berupa jarak, azimuth, dan kecepatan. Sinyal Radar ada dua jenis, yaitu pulsa (Pulsed Radar) dan gelombang kontinyu (Continuous Wave Radar).
Fery Gustomo, Suwadi Suwadi
doaj  

Ultra‐Fast and Energy‐Efficient PZT Optical Tunable Delay Lines for Programmable Photonic Systems

Laser &Photonics Reviews, EarlyView.
Thin‐film PZT enables optical tunable delay lines that simultaneously offer sub‐nanosecond switching, low propagation loss, and zero‐static‐power programmability. A five‐bit on‐chip delay line provides a maximum delay of 387.5 ps with a resolution of 12.5 ps, while reconfigurable MZI splitting ratios further enable non‐volatile optical arbitrary ...
Cunyu Shi, Chenlei Li, Wei Chen, Shengjie Tang, Tao Shu, Haojie Zhu, Haorui Liu, Yueyang Zhang, Long Zhang, William Shieh, Feng Qiu, Daoxin Dai   +11 more
wiley   +1 more source

Contactless HR Monitoring and HRV Assessment by Attention-Based Fusion Using a Continuous Wave Radar System

IEEE Access
Continuous wave (CW) radar is an alternative to gold-standard electrocardiography (ECG) for contactless heart rate (HR) monitoring and heart rate variability (HRV) analysis. This work aims to monitor HR and HRV using a deep learning (DL) model with a 61&#
Hui Lu, Robert Holzschuh, Robert Freund, Steffen Ortmann, Dirk Grosse Meininghaus, Alexander Koelpin   +5 more
doaj   +1 more source

Evaluation of gridded scanning ARM cloud radar reflectivity observations and vertical doppler velocity retrievals [PDF]

Atmospheric Measurement Techniques, 2014
The scanning Atmospheric Radiation Measurement (ARM) cloud radars (SACRs) provide continuous atmospheric observations aspiring to capture the 3-D cloud-scale structure.
K. Lamer, A. Tatarevic, I. Jo, P. Kollias   +3 more
doaj   +1 more source

Modeling rainfall drop size distribution moments using an S‐band polarimetric radar in complex terrain

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Using S‐band dual‐polarization radar and disdrometers during PRECIP 2022 in Taiwan, we analyze a Mei‐Yu frontal event with widespread stratiform rain and embedded convection. Multiple disdrometers are used to create a novel drop size distribution model for S‐band radars resolving both the drizzle and precipitation modes. The model reveals both inferred
Ian C. Cornejo, Angela K. Rowe, Michael M. Bell, Wei‐Yu Chang   +3 more
wiley   +1 more source