Results 101 to 110 of about 14,673 (249)
Classification Algorithm for Sitting Postures Using Weighted Random Forest
IET Image Processing, Volume 19, Issue 1, January/December 2025.The increasing use of computers has led to a rise in neck and back disorders due to poor posture. This study proposes a method to classify unhealthy sitting postures by capturing front‐facing images and detecting facial and shoulder coordinates and angles using a weighted random forest algorithm.
Jaeeun Lee, Hongseok Choi, Jongnam Kim
wiley +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 +3 more
core +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 +3 more
openaire +2 more sources
Low NF Active Quasi‐Circulator Design Based on Noise Suppression Technique
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.A novel design method for low noise active quasi‐circulator (QC) is presented, which is composed of two couplers and an amplifier. To reduce the additional noise introduced by the amplifier, a noise suppression technique that exploits the inherent isolation of the coupler is employed.
Zhan Chen, Chunxia Zhou, Wen Wu
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 +3 more
doaj +1 more source
Inexpensive SAR testbed for 3D mmWave imaging applications
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.In this paper, the authors investigate and develop a low‐cost synthetic aperture radar (SAR) testbed and utilise it to capture and reconstruct high‐resolution 3D mmWave SAR images. Abstract In this paper, the authors investigate and develop a low‐cost synthetic aperture radar (SAR) testbed and utilise it to capture and reconstruct high‐resolution 3D ...
S M Yahea Mahbub +2 more
wiley +1 more source
Stairs Detection for Enhancing Wheelchair Capabilities Based on Radar Sensors
, 2017 Powered wheelchair users encounter barriers to their mobility everyday. Entering a building with non barrier-free areas can massively impact the user mobility related activities.
Abdulatif, Sherif +5 more
core +1 more source
Space scanning FMCW-based two-dimensional frequency diverse array radar
The Journal of Engineering, 2019 The frequency-modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is extended to two dimensions (2D). The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased ...
Savaş Karadağ +2 more
doaj +1 more source
Multi-pixel high-resolution three-dimensional imaging radar [PDF]
, 2012 A three-dimensional imaging radar operating at high frequency e.g., 670 GHz radar using low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform, is disclosed that operates with a multiplexed beam ...
Bryllert, Tomas E. +8 more
core +1 more source
High-resolution three-dimensional imaging radar [PDF]
, 2010 A three-dimensional imaging radar operating at high frequency e.g., 670 GHz, is disclosed. The active target illumination inherent in radar solves the problem of low signal power and narrow-band detection by using submillimeter heterodyne mixer receivers.
Chattopadhyay, Goutam +6 more
core +1 more source