Results 11 to 20 of about 33,853 (258)

Performance Analysis and Constellation Design for the Parallel Quadrature Spatial Modulation [PDF]

open access: yesEntropy, 2020
Spatial modulation (SM) is a multiple-input multiple-output (MIMO) technique that achieves a MIMO capacity by conveying information through antenna indices, while keeping the transmitter as simple as that of a single-input system.
Manar Mohaisen   +2 more
doaj   +2 more sources

Constellation Design for Widely Linear Transceivers [PDF]

open access: yesEURASIP Journal on Advances in Signal Processing, 2010
Constellation design has been previously addressed by assuming that there is a linear equalizer at the receiver side. However, the widely linear equalizer is well known to outperform the linear one with no significant complexity increase; we derive ...
Sterle Fabio   +2 more
doaj   +5 more sources

A Secure Constellation Design for Polarized Modulation in Wireless Communications

open access: yesIEEE Access, 2020
This paper presents a modulation constellation design technique for polarization modulation communication in wireless communication. Such constellation can be used for confidential polarization modulation communication on the depolarization channel ...
Degang Sun   +3 more
doaj   +3 more sources

Efficient Topology Design for LEO Mega-Constellation Using Topological Structure Units with Heterogeneous ISLs [PDF]

open access: yesSensors
With the maturation of reusable launch vehicle technology and satellite mass-production capabilities, global mega-constellation projects have entered a phase of rapid expansion.
Wei Zhang   +4 more
doaj   +2 more sources

Investigating Orbital Configurations for a LEO Satellite Telephony Constellation over the Territory of Iran [PDF]

open access: yesعلوم، فناوری و کاربردهای فضایی, 2022
In this paper, we investigate the orbital characteristics of a constellation consisting of 24 LEO satellites. All the configurations are based on the Walker Delta model, which include single- regulated (one constellation) and double- regulated ...
Mohammad Haji Jafari, Sahar Aminabadi
doaj   +1 more source

Design of Space Target Surveillance Constellation Based on Simulation Comparison Method [PDF]

open access: yesSensors
Aiming at the requirement of space situational awareness on the full-domain and all-time coverage capability of low Earth orbit space targets and focusing on the design of a space-based space target awareness system, a space target awareness ...
Qinying Hu, Desheng Liu, Ziwei Dong
doaj   +2 more sources

Design Method of Orthogonal Circular Orbit Satellite Constellation Based on Geometric Analysis [PDF]

open access: yesJisuanji gongcheng, 2020
Orthogonal circular orbit constellation combines the advantages of polar orbit constellation and equatorial orbit constellation to achieve continuous global coverage,improving the coverage performance of pure polar orbit constellation at low and middle ...
BAO Xiang, LEI Lei, SHEN Gaoqing, LI Zhilin
doaj   +1 more source

Analytical design and performance analysis of LEO mega chain satellite constellation

open access: yesXibei Gongye Daxue Xuebao, 2022
With the development of microsatellite technology and the growth of ground reconnaissance demand, the rapid design of a LEO constellation with minimum satellite number, low revisit time (within 10 minutes), and permanent inter-satellite links has become ...
ZHENG Pengfei, CHEN Hongyu, GUO Chongbin
doaj   +1 more source

Constellation and Interleaver Design for BICM [PDF]

open access: yes2011 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.
Md. Jahangir Hossain 0002   +2 more
openaire   +1 more source

Design of Mega-Constellations for Global Uniform Coverage with Inter-Satellite Links

open access: yesAerospace, 2022
Constellation configuration design is a prerequisite and critical step in the construction of a mega-constellation system in low Earth orbit. However, the huge number of satellites and the intricate changes in relative positions among them make the ...
Lu Jia   +3 more
doaj   +1 more source

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