Results 21 to 30 of about 3,041,315 (395)
Optical wireless communications utilizing a dicode PPM PIN-BJT receiver [PDF]
, 2005 Original results are presented for an optical wireless system employing dicode pulse position modulation (DiPPM) and a PIN-BJT receiver. When operating at and a bit rate of 10 Mb/s a sensitivity of –51 dBm (Pe=10-9) is achieved and this represents a ...
Cryan, R.A., Menon, M.
core +1 more source
The Journal of Engineering, 2013 This study provides an insight into the effectiveness of an optical network unit (ONU) sleep technique, where a subcomponent of the ONU is powered down during the absence of input traffic.
Susumu Nishihara +5 more
doaj +1 more source
Transmitter and receiver technologies for optical wireless [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020 Providing a reliable link, with sufficient signal-to-noise ratio (SNR) and bandwidth to deliver high-capacity communications is a critical challenge for optical wireless (OW) communications and understanding and jointly optimizing the performance of the transmitter and receiver subsystems is a key part of this.
O'Brien, D, Rajbhandari, S, Chun, H
openaire +2 more sources
Bandwidth-Efficient WDM-CAP-PON Using Digital Hilbert Single-Sideband Modulation
IEEE Photonics Journal, 2015 We propose a wavelength division multiplexing-carrier-less amplitude/phase modulation-passive optical network (WDM-CAP-PON) downstream with enhanced bandwidth efficiency using low-cost digital Hilbert single-sideband modulation.
Z. Dong, J. Yu, J. Lu
doaj +1 more source
Measurement Based Reconfigurations in Optical Ring Metro Networks [PDF]
, 2005 Single-hop wavelength division multiplexing (WDM) optical ring networks operating in packet mode are one of themost promising architectures for the design of innovative metropolitan network (metro) architectures. They permit a cost-effective design, with
J. M. FINOCHIETTO +7 more
core +1 more source
Laser-induced ultrasound transmitters for large-volume ultrasound tomography
Photoacoustics, 2022 We present a protocol for the design, fabrication and characterisation of laser-induced ultrasound transmitters with a specific, user-defined frequency response for the purpose of ultrasound tomography of large-volume biomedical samples.
D. Thompson +3 more
doaj +1 more source
Multi-format transmitters for coherent optical M-PSK and M-QAM transmission
, 2022 S.225-229Coherent optical transmission returns into the focus of research. One significant advantage is the preservation of all the information of the optical field during detection, leading to enhanced possibilities for optical multi-level modulation ...
Seimetz, M.
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IEEE Photonics Journal, 2013 Recent advances in transmitters for optical fiber communications that exploit the powerful capabilities of digital signal processing and digital-to-analog conversion are reviewed.
J. C. Cartledge, A. S. Karar
doaj +1 more source
Lambertian source modelling of free space optical ground-to-train communications [PDF]
, 2012 There is a increasing demand for high speed data services while travelling on trains and other means of public transportation. Hence, an alternative technology to radio frequency (RF) communications called free space optics (FSO) could be used to provide
Ghassemlooy, Zabih +9 more
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IEEE Photonics Journal, 2017 Mach–Zehnder (MZ) modulators are widely used in optical transmitters to generate high-speed optical signals. With electronic dispersion compensation (EDC), the driving signals to MZ modulators change from digital to analog, or continuous waveforms.
Xiatao Huang +6 more
doaj +1 more source