Results 251 to 260 of about 4,005,914 (318)

Adaptive Beam Search for Initial Beam Alignment in Millimetre-Wave Communications

IEEE Transactions on Vehicular Technology, 2022
In this correspondence, we propose an adaptive beam search algorithm to solve the initial beam alignment problem in millimetre-wave communications, where there is neither prior knowledge on the instantaneous channel fading status nor the fading ...
Chun-Shan Liu, Lou Zhao, Min Li, Lei Yang   +3 more
semanticscholar   +1 more source

Technology for Millimetre Wave Radiometers

33rd European Microwave Conference, 2003, 2003
Technology for millimetre wave radiometers is discussed. Distinction between coherent and incoherent detection is also addressed. As an example, details of the 70 GHz ultra low noise and high stability receivers for the European Space Agency (ESA) Planck Mission is given. These receivers are part of the Low Frequency Instrument (LFI). The LFI receivers
Hughes, N., Jukkala, P., Kangaslahti, P., Karttaavi, Timo, Sjöman, P., Varis, Jussi, Tuovinen, Jussi   +7 more
openaire   +1 more source

Millimetre Wave Propagation

Nature, 1946
INFORMATION has recently been disclosed about the absorption band in the oxygen molecule for electromagnetic radiation of wave-length in the region of 5 mm.1. This communication gives preliminary details of an experimental investigation on propagation over sea of waves in this wave-length region.
H. R. L. LAMONT, A. G. D. WATSON
openaire   +1 more source

A Millimetre-Wave Radar-Based Fall Detection Method Using Line Kernel Convolutional Neural Network

IEEE Sensors Journal, 2020
Fall accidents are significant threats to the health and life of older people. When a millimetre-wave (mmWave) frequency modulated continuous wave (FMCW) radar is used for fall detection, the selected features for further classification can determine the
Bo Wang, Liang Guo, Hao Zhang, Yong-Xin Guo   +3 more
semanticscholar   +1 more source

Conformal printed MIMO antenna with DGS for millimetre wave communication applications

International Journal of Electronics Letters, 2020
This paper presents the analysis of a collinear MIMO (multiple input and multiple output) antenna and its conformal models for 5G and millimetre wave communications.
Usha Devi Y, Madhav Boddapati, A. T, S. k, P. P   +4 more
semanticscholar   +1 more source

Millimetre-wave beam steering with analog-resolution and minimised distortion based on liquid crystals tunable delay lines with enhanced signal-to-noise ratios

Security + Defence, 2020
Millimetre-wave beam-steering distortions are due mainly to unbalanced feeding amplitudes among the delay lines network. To compensate for this, active amplifiers or attenuators are employed, increasing the circuit complexity and costs, whilst ...
Jinfeng Li
semanticscholar   +1 more source

Lasers and millimetre waves

Journal of the Institution of Electrical Engineers, 1963
An article based on a paper with the full title ‘A proposedfast-wave photoelectric laser mixer for millimetre-wavegeneration’, which is published this month in the Proceedings.
openaire   +1 more source

Terrain imaging millimetre wave radar

7th International Conference on Control, Automation, Robotics and Vision, 2002. ICARCV 2002., 2004
This paper presents an overview of the work being conducted by the Australian Centre for Field Robotics (ACFR) and the CRC for mining technology and equipment (CMTE) into sensors and systems for real-time environment imaging. Radar is perhaps the only sensor capable of performing imaging tasks in environment where high levels of dust, water vapour, and
Steve Scheding, Graham M. Brooker, Mark Bishop, Ross Hennessy, Andrew Maclean   +4 more
openaire   +2 more sources

Millimetre wave spectroscopy of PANHs: phenanthridine

Phys. Chem. Chem. Phys., 2007
The pure rotational spectrum of phenanthridine (C(13)H(9)N), a small polycyclic aromatic nitrogen heterocycle (PANH), has been measured from 48 to 85 GHz employing Stark modulated millimetre wave absorption spectroscopy of a supersonic rotationally cold molecular beam.
Don, McNaughton, Peter D, Godfrey, Ronald D, Brown, Sven, Thorwirth   +3 more
openaire   +2 more sources

Human Posture Capturing with Millimetre Wave Radars

Mediterranean Conference on Embedded Computing, 2020
Millimetre wave (mmWave) radar, as an emerging technique, is increasing in popularity for human activity recognition. In this paper, we study the potential use of mmWave radars for human posture capturing and analysis.
Han Cui, N. Dahnoun
semanticscholar   +1 more source