Results 21 to 30 of about 1,174,103 (294)
Optimum Watermark Detection and Embedding in Digital Images [PDF]
, 1998 This work concentrates on the problem of watermarking of still images using the luminance component, through the use of spread spectrum techniques, both in space (direct sequence spread spectrum or DSSS) and frequency (frequency hopping or FH), following
Sayrol Clols, Elisa +1 more
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A direct-sequence spread-spectrum communication system for integrated sensor microsystems [PDF]
, 2005 Some of the most important challenges in health-care technologies have been identified to be development of noninvasive systems and miniaturization.
Arslan, T., Aydin, N., Cumming, D.R.S.
core +1 more source
Sensors, 2017 With the rapid development of wireless communication systems and electronic techniques, the limited frequency spectrum resources are shared with various wireless devices, leading to a crowded and challenging coexistence circumstance. Cognitive radio (CR)
Hailiang Xiong +5 more
doaj +1 more source
Interstellar Communication: The Case for Spread Spectrum
, 2011 Spread spectrum, widely employed in modern digital wireless terrestrial radio systems, chooses a signal with a noise-like character and much higher bandwidth than necessary.
Messerschmitt, David G.
core +1 more source
Statistical mechanical evaluation of spread spectrum watermarking model with image restoration [PDF]
, 2019 In cases in which an original image is blind, a decoding method where both the image and the messages can be estimated simultaneously is desirable. We propose a spread spectrum watermarking model with image restoration based on Bayes estimation.
Hayashi, Kao +3 more
core +2 more sources
Hiding Single Photons With Spread Spectrum Technology
, 2010 We describe a proof-of-principal experiment demonstrating the use of spread spectrum technology at the single photon level. We show how single photons with a prescribed temporal shape, in the presence of interfering noise, may be hidden and recovered ...
Belthangady, Chinmay +5 more
core +1 more source
Compressive Sampling of Color Retinal Image Using Spread Spectrum Fourier Sampling and Total Variant
IEEE Access, 2022 In medical imaging, the application of retinal images demands a lot of retinal photos to analyze and requires efficient compression techniques for retinal image storage.
Ledya Novamizanti +5 more
doaj +1 more source
Telehealth Secure Solution to Provide Childhood Obesity Monitoring
Sensors, 2022 Childhood obesity causes not only medical and psychosocial problems, it also reduces the life expectancy of the adults that they will become. On a large scale, obese adults adversely affect labor markets and the gross domestic product of countries ...
Elitania Jiménez-García +4 more
doaj +1 more source
Spread spectrum techniques for indoor wireless IR communications [PDF]
, 2003 Multipath dispersion and fluorescent light interference are two major problems in indoor wireless infrared communications systems. Multipath dispersion introduces intersymhol interference at data rates above 10 Mb/s, while fluorescent light induces ...
O'Farrell, T, Wong, KK
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background The HIT network was established in 2000 to create a population‐based structure aiming to improve survival rates and reduce late effects for children with central nervous system (CNS) tumors by conducting comprehensive clinical trials.
Stefan Rutkowski +59 more
wiley +1 more source