Results 31 to 40 of about 13,582,991 (332)
Remote Sensing, 2022 The Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) provided twenty years of data on Earth’s time-varying gravity field.
Carlos M. A. Deccia +2 more
doaj +1 more source
Constellation design of DFT-S-OFDM with dual-mode index modulation in VLC.
Optics Express, 2022 In this paper, we for the first time propose a novel partitioning-based constellation design approach for discrete Fourier transform-spread-orthogonal frequency division multiplexing modulation with dual-mode index modulation (DFT-S-OFDM-DM) in visible ...
Chen Chen +4 more
semanticscholar +1 more source
Non-Self-Intersecting Trajectories and Their Applications to Satellite Constellation Design and Orbital Capacity [PDF]
Journal of Guidance Control and Dynamics, 2021 This work focuses on the generation of non-self-intersecting relative trajectories, and their applications to satellite constellation design, slotting architectures, and Space Traffic Management.
D. Arnas, R. Linares
semanticscholar +1 more source
Constellation and Interleaver Design for BICM [PDF]
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011 In this paper, we propose a new BICM design which considers hierarchical (nonequally spaced) constellations, a bit-level multiplexer, and multiple interleavers. It is shown that this new scheme outperform previous BICM designs because it exploits the temporal structure of the coded sequence.
Hossain, M.J. +2 more
openaire +1 more source
Constellation Design for Multiuser Non-Coherent Massive SIMO Based on DMPSK Modulation
IEEE Transactions on Communications, 2022 Non-coherent (NC) schemes combined with massive antenna arrays are proposed to replace traditional coherent schemes in scenarios which require an excessive number of reference signals, since NC approaches avoid channel estimation and equalization ...
M. J. Lopez-Morales +3 more
semanticscholar +1 more source
, 2013 An asymptotically optimal trellis-coded modulation (TCM) encoder requires the joint design of the encoder and the binary labeling of the constellation.
Alex Alvarado +4 more
core +2 more sources
On the performance of improved quadrature spatial modulation
ETRI Journal, 2020 Quadrature spatial modulation (QSM) utilizes the in‐phase and quadrature spatial dimensions to transmit the real and imaginary parts of a single signal symbol, respectively.
Tasnim Holoubi +3 more
doaj +1 more source
Spatial and Temporal Sampling Properties of a Large GNSS-R Satellite Constellation
Remote Sensing, 2023 Using large constellations of smallsats, mission designers can improve sampling density and coverage. We develop performance metrics that characterize key sampling properties for applications in numerical weather prediction and optimize orbit design ...
Jack Winkelried +2 more
doaj +1 more source
Constellation Design for Future Communication Systems: A Comprehensive Survey
IEEE Access, 2021 The choice of modulation schemes is a fundamental building block of wireless communication systems. As a key component of physical layer design, they critically impact the expected communication capacity and wireless signal robustness.
Jon Barrueco +3 more
semanticscholar +1 more source
Deep Learning of Geometric Constellation Shaping including Fiber Nonlinearities [PDF]
, 2018 A new geometric shaping method is proposed, leveraging unsupervised machine learning to optimize the constellation design. The learned constellation mitigates nonlinear effects with gains up to 0.13 bit/4D when trained with a simplified fiber channel ...
Eriksson, Tobias A. +3 more
core +2 more sources