Results 81 to 90 of about 18,596 (191)
Tensor-Based Channel Estimation Considering Beam Squint Effects in LEO Satellite Communications
IEEE AccessIn this paper, we propose a tensor-based channel estimation framework for beam squint-aware low Earth orbit (LEO) downlink communication at a ground station.
Kyungrak Son, Pansoo Kim, Jung Hoon Lee
doaj +1 more source
Validation of CIPS Version 5.20 PMC Data
Earth and Space Science, Volume 13, Issue 4, April 2026.Abstract The Cloud Imaging and Particle Size (CIPS) instrument operated onboard the NASA Aeronomy of Ice in the Mesosphere (AIM) satellite from April 2007 to March 2023. CIPS was a nadir‐viewing UV imager that made global measurements of scattered sunlight at high spatial resolution.
Jerry D. Lumpe +7 more
wiley +1 more source
IEEE Photonics JournalFree-space optical (FSO) communication modules to be mounted on the satellite for satellite-to-ground links need to be tested and confirmed on the ground before they are launched into space.
Woohyeon Moon, Hoon Kim
doaj +1 more source
DIRECT OPTICAL HIGH SPEED DOWNLINKS AND GROUND STATION NETWORKS FOR SMALL LEO MISSIONS
, 2010 Direct microwave data downlink capacity of today’s earth observation satellites is limited in terms of available spectrum, transmission data rate, and power consumption.
Giggenbach, Dirk +3 more
core
, 2009 In this contribution we propose and investigate a relay diversity transmission scheme for the direct-sequence code-division multiple-access (DS-CDMA) downlink, where each (destination) mobile terminal (MT) is aided by a cluster of relays for achieving ...
Yang, Lie-Liang, Fang, Wei, Hanzo, Lajos
core +1 more source
Enhanced Data Return from Lunar Farside using RF-Optical TT and C
, 2008 Science return and high bandwidth communications are key issues to support the foreseen endeavours on spaceflights to the Moon and beyond. For a given mass, power consumption and volume, laser communications can offer an increase in TM bandwidth over ...
Giggenbach, Dirk +5 more
core
Hyperspectral Image Segmentation for Optimal Satellite Operations: In-Orbit Deployment of 1D-CNN
Remote SensingAI on spaceborne platforms optimizes operations and increases automation, crucial for satellites with limited downlink capacity. It can ensure that only valuable information is transmitted, minimizing resources spent on unnecessary data, which is ...
Jon Alvarez Justo +6 more
doaj +1 more source
Performance of Multibeam Satellite Systems with Tomlinson-Harashima Precoding
, 2009 A multibeam satellite system can be modelled as a multiple-input multiple-output (MIMO) system with an interbeam interference matrix that is derived from the positions of the users in the different beams.
Banelli, Paolo +2 more
core
Current optical technologies for wireless access
, 2009 The objective of this paper is to describe recent activities and investigations on free-space optics (FSO) or optical wireless and the excellent results achieved within SatNEx an EU-framework 6th programme and IC 0802 a COST action.
Sheikh Muhammed, S. +8 more
core
Downlink Reference Signal Design for LTE Compatible GEO Mobile Satellite System
, 2012 Reference signal (RS) is a crucial signal which is used for channel estimation and data demodulation in 3GPP long term evolution (LTE) system. However, due to the differences of channel environment, interference situation and system physical resource ...
Si, Ying +7 more
core +1 more source