Results 61 to 70 of about 145,584 (294)
Hardware-Efficient Phase Estimation for Digital Coherent Transmission With Star Constellation QAM
IEEE Photonics Journal, 2010 In order to build optical transmission systems for 100 Gb/s and above on a single wavelength division multiplexing channel, transition from quadrature phase-shift keying (QPSK) to higher quadrature amplitude modulation (QAM) formats seems to be ...
Sebastian Hoffmann +6 more
doaj +1 more source
Joint measurement of multiple noncommuting parameters [PDF]
, 2018 Although quantum metrology allows us to make precision measurements beyond the standard quantum limit, it mostly works on the measurement of only one observable due to the Heisenberg uncertainty relation on the measurement precision of noncommuting ...
Assad, Syed M. +6 more
core +3 more sources
Optics Express, 2014 We study the performance of novel quadrature amplitude modulation (QAM) constellations for 100 Gb/s transmission by a directly-modulated laser. Due to the strong nonlinearity of a directly-modulated laser, rectangular constellations suffer a large ...
William A. Ling +2 more
semanticscholar +1 more source
Symbol‐Level GRAND‐Assisted Detection for Polar‐Coded Spatial Modulation in MIMO Systems
International Journal of Communication Systems, Volume 39, Issue 7, 10 May 2026.This research presents an integrated polar‐coded spatial modulation (PCSM) transceiver scheme for MIMO transmission over Rayleigh fading channels. The proposed architecture employs linear spatial signal processing for antenna and symbol estimation, followed by symbol‐level guessing random additive noise decoding (symbol‐level GRAND)–assisted detection ...
Abhilasha Gautam +2 more
wiley +1 more source
Advanced Photonics Research, Volume 7, Issue 4, April 2026.This review chronicles the evolution of intelligent electromagnetic (EM) perception systems empowered by metasurfaces and artificial intelligence. The progression from data‐driven imaging with implicit priors to semantic sensing with explicit priors is systematically reviewed.
Xingrui Zhou +5 more
wiley +1 more source
Российский технологический журналObjectives. At the present time, amplitude-phase shift keyed (APSK) signals are actively used in satellite communication systems. In particular, they are applied in systems which operate in a limited radio frequency spectrum with increased data ...
G. V. Kulikov, X. Kh. Dang
doaj +1 more source
Demultiplexing in mode-division multiplexing system using multichannel blind deconvolution
IEEE Photonics Journal, 2016 We propose a mode demultiplexing method based on multichannel blind deconvolution (MBD) for a mode-division multiplexing (MDM) system. A 6 $\times$ 6 MDM transmission system is simulated to verify the performance of MBD.
Li Yan, Guijun Hu
doaj +1 more source
, 2016 The efficiency of using intensity modulated light for estimation of scattering properties of a turbid medium and for ballistic photon discrimination is theoretically quantified in this article. Using the diffusion model for modulated photon transport and
Alouini, Mehdi +3 more
core +3 more sources
XOR‐Logic Phase Coding Programmable Metasurface for Low Power‐Consumption Systems
Advanced Science, Volume 13, Issue 22, 17 April 2026.By leveraging XOR logic, the biasing‐network complexity of 2D programmable metasurfaces is reduced from m×n to m+n through efficient row‐column control. This enables versatile functions including beam deflection and beamforming, facilitating applications in wireless communications and beyond.
Ruichao Zhu +10 more
wiley +1 more source
Optimizing Detection Schemes for Broadband Pump‐Probe Microscopy
Microscopy Research and Technique, Volume 89, Issue 4, Page 551-556, April 2026.Small spot sizes and broadband spectral coverage create unusual noise challenges for broadband pump‐probe microscopy. Analysis of probe and detector noise characteristics can provide strategies for mitigating these challenges. ABSTRACT Although similar to more commonly implemented single wavelength approaches, broadband pump‐probe or transient ...
Kendall Benton +3 more
wiley +1 more source