Results 31 to 40 of about 6,147,351 (173)
Frontiers in Physiology, 2019 Background: It is known that the respiration-modulated photoplethysmographic (PPG) signals could be used to derive respiratory frequency (RF) and that PPG signals could be measured from different body sites.
Vera Hartmann +5 more
doaj +1 more source
Sensors, 2023 Zero-ohm resistors, also known as jumpers, are commonly used in early radio frequency (RF) prototypes as they can help engineers identify the most optimal engineering solution for their system or create application-specific hardware configurations in ...
Aleksandr Vasjanov, Vaidotas Barzdenas
doaj +1 more source
User localisation using visual sensing and RF signal strength [PDF]
, 2008 In this paper, we simulate a museum scenario where we are concerned with identifying the exhibit that a person is observing. Many different technologies exist for determining the location of a user, including GPS, GSM and RF-id tags.
Ó Conaire, Ciarán +4 more
core +2 more sources
A survey on RF mapping for indoor positioning
, 2015 2015 23rd Signal Processing and Communications Applications Conference, SIU 2015 -- 16 May 2015 through 19 May 2015 -- -- 113052In RF based indoor positioning systems, RF map is constructed by collecting Received Signal Strength (RSS) values from access
Bozkurt, Sinem +9 more
core +2 more sources
Application and design manual for High Performance RF products [PDF]
, 2014 design work much easier NXP’s RF Manual – one of the most important reference tools on the market for today’s RF designers – features our complete range of RF products, from low to high power signal conditioning & high speed data converters.
Performance Rf +2 more
core
Optical RF Self-Interference Cancellation by Using an Integrated Dual-Parallel MZM
IEEE Photonics Journal, 2017 An optical approach to implement radio-frequency (RF) self-interference cancellation using an integrated dual-parallel Mach–Zehnder modulator (DP-MZM) is proposed and demonstrated experimentally.
Xiuyou Han +3 more
doaj +1 more source
A UHF Passive RFID Tag Front-End Design With a Novel True Random Number Generator
IEEE AccessAmong various wireless communication methods, the ultra-high frequency (UHF) passive Radio Frequency Identification (RFID) electronic tags are widely used due to their ability to transfer information without internal power supply.
Xiaoming Teng +2 more
doaj +1 more source
SensorsMost calibration laboratories prefer the Direct Comparison Transfer Method (DCTM) for a reliable and accurate calibration of power sensors in the radio frequency (RF) scope.
Erkan Danaci
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IEEE Photonics Journal, 2022 We proposed an all-optical Ka-band microwave long-distance dissemination system based on an optoelectronic oscillator (OEO). In this system, a single tone with high spectrum purity and low phase noise is excited by an injection-locked OEO, and ...
Kaiyu Zhang +3 more
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A Coherent Dual-Band FMCW Photonic Radar Based on a Synchronized FMCW Optoelectronic Oscillator
IEEE AccessThis paper proposes and experimentally demonstrates a novel coherent radar architecture based on a synchronized frequency-modulated continuous-wave optoelectronic oscillator.
Youngseok Bae, Minji Hyun, Joonyong Park
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