Results 41 to 50 of about 13,582,991 (332)
Quadrature Phase Shift Keying (QPSK) Modulator Design using Multi-Port Network in Multilayer Microstrip-Slot Technology for Wireless Communication Applications [PDF]
, 2015 The design of the quadrature phase shift keying (QPSK) modulator by using a multi-port network is proposed in this article for the use in wireless communication applications. The multi-port network is in the form of multilayer microstrip-slot technology.
Mohamed Ghazali, S. N. A., Seman, N.
core +2 more sources
Joint Constellation Design for Noncoherent MIMO Multiple-Access Channels [PDF]
IEEE Transactions on Information Theory, 2020 We consider the joint constellation design problem for the noncoherent multiple-input multiple-output multiple-access channel (MAC). By analyzing the noncoherent maximum-likelihood detection error, we propose novel design criteria so as to minimize the ...
K. Ngo +3 more
semanticscholar +1 more source
Designing good partial coverage satellite constellations
Astrodynamics Conference, 1990 Design of satellite constellations providing partial coverage of certain ground regions is becoming more important as small low-altitude satellites receive increased attention. The purpose of this study is to develop the procedures necessary for deriving the best constellations for partial coverage.
Hanson, John +2 more
openaire +3 more sources
Downlink Coverage and Rate Analysis of Low Earth Orbit Satellite Constellations Using Stochastic Geometry [PDF]
, 2020 As low Earth orbit (LEO) satellite communication systems are gaining increasing popularity, new theoretical methodologies are required to investigate such networks' performance at large.
Angervuori, Ilari +4 more
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SCMA codebook design based on resource block constellation
Tongxin xuebao, 2018 Aiming at the problems of typical sparse code multiple access codebook design scheme based on multidimensional mother constellation that the complexity is high and the minimum Euclidean distance between constellation points on resource blocks is ...
Xiaotao SHAO, Mingkun GUO, Wei YANG
doaj +2 more sources
One-Bit Precoding and Constellation Range Design for Massive MIMO with QAM Signaling
, 2018 The use of low-resolution digital-to-analog converters (DACs) for transmit precoding provides crucial energy efficiency advantage for massive multiple-input multiple-output (MIMO) implementation.
Liu, Ya-Feng, Sohrabi, Foad, Yu, Wei
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Designing Good Multi-Dimensional Constellations [PDF]
IEEE Wireless Communications Letters, 2012 In this letter we consider the design of multi-dimensional compact constellations that minimize the average symbol energy for a given minimum Euclidian distance between constellation points. We formulate the constellation design as a non-convex quadratically constrained quadratic programming. We propose a simple and efficient optimization method, which
Beko, Marko, Dinis, Rui
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Novel Constellation Design Tool: A Framework for Asymmetric Constellation Design
, 2022 This paper addresses the problem of optimization of earth orbit space vehicle constellations balancing access over specified earth regions subject to constraints on the constituent members’ orbital elements. Whereas symmetric constellations such as Walker Delta Parameter Constellations are often a convenient starting point for system trade studies, the
Casey, Kyle, Hunter, William
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Generalized PSK in Space Time Coding [PDF]
, 2004 A wireless communication system using multiple antennas promises reliable transmission under Rayleigh flat fading assumptions. Design criteria and practical schemes have been presented for both coherent and non-coherent communication channels.
Han, Guangyue
core +3 more sources
Dianxin kexue, 2023 With the growing maturity of millimeter wave technology and high-throughput satellite communication technology, as well as the urgent need for global broadband communication services, the construction of LEO giant communication constellation has ...
Yafei ZHAO +3 more
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