Results 21 to 30 of about 2,253,897 (339)
Multilevel pulse-position modulation for optical power-efficient communication [PDF]
, 2011 A family of modulation formats is derived by combining pulse-position modulation (PPM) with multilevel dual-polarization signal constellations. With 16-PPM, gains of up to 5.4 dB are obtained over dual-polarization QPSK, at the cost of reduced spectral ...
Agrell, Erik, Karlsson, Magnus
core +1 more source
Full-Field, Carrier-Less, Polarization-Diversity, Direct Detection Receiver based on Phase Retrieval [PDF]
, 2019 We realize dual-polarization full-field recovery using intensity only measurements and phase retrieval techniques based on dispersive elements. 30-Gbaud QPSK waveforms are transmitted over 520-km standard single-mode fiber and equalized from the receiver
Chen, Haoshuo +5 more
core +2 more sources
Sensors, 2017 It is well known that multipath effect remains a dominant error source that affects the positioning accuracy of Global Navigation Satellite System (GNSS) receivers.
Lin Xie +3 more
doaj +1 more source
Massive MIMO With Dual-Polarized Antennas
IEEE Transactions on Wireless Communications, 2023 This paper considers a single-cell massive MIMO (multiple-input multiple-output) system with dual-polarized antennas at both the base station and users. We study a channel model that includes the key practical aspects that arise when utilizing dual-polarization: channel cross-polar discrimination (XPD) and cross-polar correlations (XPC) at the ...
Ozgecan Ozdogan, Emil Bjornson
openaire +2 more sources
Dual polarization operation of nanostructure arrays in the MIR region [PDF]
, 2018 In this paper, we report on arrays of asymmetric split H-shape nanostructures tuned to produce two distinct resonances at wavelengths that range from 3 μm to 7 μm.
De La Rue, Richard M. +3 more
core +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 This study deals with coastline extraction using multipolarization spaceborne synthetic aperture radar (SAR) imagery acquired over coastal intertidal areas.
Emanuele Ferrentino +4 more
doaj +1 more source
IEEE Access, 2017 A fast dual polarization hopping (FDPH) system is designed to enhance the physical layer secure transmission in fixed down-link satellite communications. In order to prevent the eavesdropper from detecting transmitted signals, a pair of dual polarization
Xiaokai Zhang +2 more
doaj +1 more source
Dual-Band Dual-Linear Polarization Reflectarray for mmWaves/5G Applications
IEEE Access, 2020 A dual-band dual-linear polarization reflectarray configuration is developed for future 5G cellular applications. A single layer unit cell including two pairs of miniaturized fractal patches is designed to operate at two distinct frequencies within the ...
Sandra Costanzo +3 more
doaj +1 more source
Dual-polarization topological phases and phase transition in magnetic photonic crystalline insulator
New Journal of Physics, 2021 Two-dimensional topological photonic crystals have rapidly emerged as a recent and fascinating branch of photonic research. However, most of them were limited to a specific type of polarization, TE or TM polarization.
Xiang Xi +5 more
doaj +1 more source
Dual-polarized UWB antenna array
2009 IEEE International Conference on Ultra-Wideband, 2009 The paper describes a dual-polarized antenna array for Impulse Radio Ultra Wideband (IR-UWB) applications. Firstly a brief description of the single radiator is given. Next the prototype is presented and measured data is compared with the simulated one. The linear array consisting of four components achieves a very narrow mean 3 dB beam width, which is
Adamiuk, G. +3 more
openaire +3 more sources