Results 91 to 100 of about 10,887 (225)

Basal Melting and Oceanic Observations Beneath Central Fimbulisen, East Antarctica

Journal of Geophysical Research: Oceans, Volume 130, Issue 3, March 2025.
Abstract Basal melting of ice shelves is fundamental to Antarctic ice sheet mass loss, yet direct observations remain sparse. We present the first year‐round melt record (2017–2021) from a phase‐sensitive radar on Fimbulisen, one of the fastest flowing ice shelves in Dronning Maud Land, East Antarctica.
Katrin Lindbäck, Elin Darelius, Geir Moholdt, Irena Vaňková, Tore Hattermann, Julius Lauber, Laura de Steur   +6 more
wiley   +1 more source

A Noncontact FMCW Radar Sensor for Displacement Measurement in Structural Health Monitoring

Sensors, 2015
This paper investigates the Frequency Modulation Continuous Wave (FMCW) radar sensor for multi-target displacement measurement in Structural Health Monitoring (SHM).
Cunlong Li, Weimin Chen, Gang Liu, Rong Yan, Hengyi Xu, Yi Qi   +5 more
doaj   +1 more source

A low-cost through-the-wall FMCW radar for stand-off operation and activity detection [PDF]

, 2017
In this paper we present a new through-wall (TW) FMCW radar system. The architecture of the radar enables both high sensitivity and range resolutions of
Chen, Q, Chetty, K, Ritchie, M, Woodbridge, K   +3 more
core   +1 more source

Hand Gesture Recognition Using Frequency‐Modulated Continuous Wave Radar on Tactile Displays for the Visually Impaired

Advanced Intelligent Systems, Volume 7, Issue 2, February 2025.
A radar‐based hand gesture recognition is proposed here to be integrated with 2D‐tactile displays. A multifeature encoder method is used to extract the range‐time‐map and velocity‐time‐map information from the radar in the form of spectrogram images.
Ahmed Hamza, Santosh Kumar Prabhulingaiah, Pegah Pezeshkpour, Bastian E. Rapp   +3 more
wiley   +1 more source

A Time‐Interleaved Swept‐Threshold ADC With Stable Timing for IR‐UWB Medical Radars

IET Circuits, Devices &Systems, Volume 2025, Issue 1, 2025.
This paper presents a new method for direct sampling of the backscattered signal in ultrawideband (UWB) impulse radar for vital sign detection. One of the standard methods for direct sampling in UWB radars is the time‐interleaving technique. In these converters, NOT gates (logical inverter gates) and tunable delay cells are typically used to create ...
Parisa Amiri, Javad Yavandhasani, Euclides Chuma   +2 more
wiley   +1 more source

Impact of Internal and External Interferences on the Performance of a FMCW Radar [PDF]

TransNav, 2011
Although FMCW technology has become by now mature, there are still some unsolved problems left. First group of them are noise and distortion from own transmitter or receiver.
Pawel Paprocki
doaj  

Coherent CW THz generation with a coupled‐cavity mini‐array VCSEL

Electronics Letters, Volume 61, Issue 1, January/December 2025.
A novel laser source for CW THz generation is presented here: a coupled‐cavity mini‐array vertical‐cavity surface‐emitting lasers (VCSEL). Designed with a single contact for a current in the mA range, this mini‐array VCSEL is shown to provide beat frequencies up to 300 GHz, which are converted to THz radiation in a standard homodyne THz setup. With its
Yinghui Hu, Carsten Brenner, Nikolay N. Ledentsov, Nikolay Ledentsov Jr., Vitaly A. Shchukin, Martin R. Hofmann, Markus Lindemann   +6 more
wiley   +1 more source

Perancangan Software Defined Radar Untuk Radar Pulsa dan Radar FMCW

JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI, 2017
<p><em>Abstrak</em> - <strong>Software Defined Radio (SDR) merupakan sistem komunikasi radio berbasis software yang saat ini mulai banyak diimplementasikan dan menunjukkan potensi yang besar. Tingginya efisiensi dalam hal biaya dibandingkan dengan sistem konvensional berbasis perangkat menjadi motivasi bagi berkembangnya konsep ...
Octarina Nur Samijayani, Suci Rahmatia, Vita Nur Septiyani, Ibrahim Ibrahim   +3 more
openaire   +2 more sources

A Low‐Complexity Target Detection Technique Using the Prefix Sum Algorithm

Electronics Letters, Volume 61, Issue 1, January/December 2025.
The conventional CA‐CFAR technique has a time complexity of O(n4). A novelty CA‐CFAR technique based on the prefix sum algorithm with a complexity O(n2) is proposed in this article. ABSTRACT A conventional target detection technique for FMCW millimeter‐wave radar applies a two‐dimensional (2D) cell‐averaging constant false alarm rate (CA‐CFAR) detector
Li Zhang, Hai Lin, Ke Wang, Feng Zhang
wiley   +1 more source

Design of Dual-Mode Local Oscillators Using CMOS Technology for Motion Detection Sensors

Sensors, 2018
Recently, studies have been actively carried out to implement motion detecting sensors by applying radar techniques. Doppler radar or frequency-modulated continuous wave (FMCW) radar are mainly used, but each type has drawbacks.
Keum-Won Ha, Jeong-Yun Lee, Jeong-Geun Kim, Donghyun Baek   +3 more
doaj   +1 more source