Results 291 to 300 of about 13,582,991 (332)
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Deep Learning-Based Collaborative Constellation Design for Visible Light Communication
IEEE Communications Letters, 2020In multiple-input multiple-output (MIMO) visible light communication (VLC) systems, collaborative constellation design (CC) is effective in improving performance while significantly reducing the total optical power. This letter presents the first attempt
Manh Le-Tran, Sunghwan Kim
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AI-enhanced constellation design for NOMA system: A model driven method
China Communications, 2020Grant-free Non-orthogonal Multiple Access (GF-NOMA) is a promising technology for massive access users and sporadic small-packet transmission for Beyond the 5th Generation mobile communication system(B5G) / the 6th Generation mobile communication system (
Sen Wang +4 more
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Designing MIMO communication systems: constellation choice and linear transceiver design
IEEE Transactions on Signal Processing, 2005This papers considers the design of a mutiple-input multiple-output (MIMO) communication system with channel knowledge at the transmitter and receiver. The design methods available in the literature have addressed the following two aspects of the problem: a) choice of the symbol constellations for a given transmission scheme or b) choice of the optimal
D. P. Palomar, BARBAROSSA, Sergio
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Analysis of Laser Intersatellite Links and Topology Design for Mega-Constellation Networks
IEEE Internet of Things JournalMega-constellation networks (MCNs), comprising an expansive array of orbits and satellites, will be a pivotal component of the prospective nonterrestrial network (NTN).
Junyi Yang +4 more
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Constellation Design for Quadrature Spatial Modulation
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017This paper considers constellation design for quadrature spatial modulation (QSM) to minimize the average probability of error. Different than the constellation design previously obtained for spatial modulation (SM), it is shown that, the error performance of QSM not only depends on the Euclidean distances between the amplitude-phase modulation (APM ...
Binh T. Vo, Ha H. Nguyen, Hoang D. Tuan
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Wave based design of satellite constellations
Astrodynamics Specialist Conference, 2000Designing satellite constellations is far from a solved problem. There has been little theoretical work on the subject since Walker originally classified symmetric constellations into stars arid rosettes. The stars are known to be more efficient than rosettes in providing single satellite global coverage, but, because they require near polar orbits ...
Brian Kantsiper, Howard Drake
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Polar constellations design for discontinuous coverage
Acta Astronautica, 2016Abstract A novel constellation design method is developed for discontinuous coverage of the globe and polar caps. It integrates and extends the applicability of the coverage regions and mitigates the limitations of the existing techniques based on streets-of-coverage (SOC) theory.
Sarno, Salvatore +2 more
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On 64-APSK constellation design optimization
2008 10th International Workshop on Signal Processing for Space Communications, 2008This paper investigates the design of power and spectrally efficient coded modulations based on amplitude phase shift keying (APSK) with application to broadband satellite communications. Emphasis is put on 64APSK constellations. The APSK modulation has merits for digital transmission over nonlinear satellite channels due to its power and spectral ...
Konstantinos P. Liolis, Nader S. Alagha
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Design of Constellation Sets for Multistage Systems
2016 IEEE Global Communications Conference (GLOBECOM), 2016Abstract-We consider the problem of designing constellation sets for multistage systems for high spectral efficiencies. In particular we will focus on two-stage systems where the cascaded decoding stages are associated to three types of receivers with different complexities and performances.
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Mission Design of the ORBCOMM Constellation
1998ORBCOMM is the first LEO commercial communications satellite to reach orbit and begin service. Offering paging, messaging, and data transfer services, the first two of the thirty-six member constellation were launched in April 1995. Two additional satellites are scheduled for a Taurus launch in late 1997, and subsequent Pegasus XL launches will carry ...
Maria J. Evans, Timothy D. Maclay
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