Results 71 to 80 of about 533,452 (194)
Comparison of direct and heterodyne detection optical intersatellite communication links [PDF]
The performance of direct and heterodyne detection optical intersatellite communication links are evaluated and compared. It is shown that the performance of optical links is very sensitive to the pointing and tracking errors at the transmitter and ...
Chen, C. C., Gardner, C. S.
core +1 more source
AerospaceSpace-borne antenna pointing is affected by uncertain disturbances like satellite attitude, structural flexibility, and manufacturing/installation errors. Understanding the effect of these uncertainties is crucial for antenna performance.
Shiyu Tan +4 more
doaj +1 more source
Performance Analysis of IRS-Assisted THz Communication Systems over α-μ Fading Channels with Pointing Errors. [PDF]
Sensors (Basel), 2023 Alvi SH +6 more
europepmc +1 more source
On the Performance of Millimeter Wave-based RF-FSO Links with HARQ Feedback
, 2016 This paper studies the performance of hybrid radio-frequency (RF) and free-space optical (FSO) links in the cases with and without hybrid automatic repeat request (HARQ).
Alouini, Mohamed-Slim +2 more
core +1 more source
The Feasibility of the Disturbance Accommodating Controller for Precision Antenna Pointing [PDF]
The objective of this study is to investigate the feasibility of a pointing (position loop) controller for the NASA-JPL Deep Space Network (DSN) antennas using the Disturbance Accommodating Control (DAC) theory.
Gresham, L. L. +2 more
core +1 more source
Error Curves for Lanczos' "Selected Points" Method [PDF]
The Computer Journal, 1966 Maximum error curves for Lanczos selected point method of polynomial solution to ordinary differential equations, using Chebyshev and Legendre ...
openaire +3 more sources
The Annular Suspension and Pointing (ASP) system for space experiments and predicted pointing accuracies [PDF]
An annular suspension and pointing system consisting of pointing assemblies for coarse and vernier pointing is described. The first assembly is attached to a carrier spacecraft (e.g., the space shuttle) and consists of an azimuth gimbal and an elevation ...
Anderson, W. W., Joshi, S. M.
core +1 more source
CDMA RoFSO Links With Nonzero Boresight Pointing Errors Over
IEEE Photonics Journal, 2018 Radio-on-Free-Space Optical systems constitute a very attractive option for interconnecting central base stations with remote antenna units. Nonetheless, the optical signal propagation through the atmosphere is tremendously affected by turbulence- and ...
Michalis P. Ninos +3 more
doaj +1 more source