Results 61 to 70 of about 50,507 (245)
Multipath channels of unbounded capacity [PDF]
2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, 2008 The capacity of discrete-time, non-coherent, multipath fading channels is considered. It is shown that if the delay spread is large in the sense that the variances of the path gains do not decay faster than geometrically, then capacity is bounded in the signal-to-noise ratio.
Tobias Koch 0001, Amos Lapidoth
openaire +6 more sources
Evaluation and assimilation of Arctic Weather Satellite data in the AROME‐Arctic forecast system
Quarterly Journal of the Royal Meteorological Society, EarlyView.The Arctic Weather Satellite (AWS), launched in August 2024, is a prototype for the future EPS–Sterna constellation of small satellites carrying an innovative microwave sounder. We present the first assessment of AWS in the regional AROME‐Arctic numerical weather prediction system, covering post‐launch calibration results and the impact of AWS ...
Stéphanie Guedj +2 more
wiley +1 more source
A Location and Movement Dependent GNSS Multipath Error Model for Pedestrian Applications [PDF]
, 2009 In 2002 the German Aerospace Centre (DLR) performed a measurement campaign of the land mobile multipath channel in and around the city of Munich. From this data a channel model was derived that is synthesising the measured channel impulse response.
Lehner, Andreas +2 more
core
Snow Depth Estimation on Slopes Using GPS-Interferometric Reflectometry
Sensors, 2019 Snow is one of the most critical sources of freshwater, which influences the global water cycle and climate change. However, it is difficult to monitor global snow variations with high spatial−temporal resolution using traditional techniques due to
Haohan Wei +4 more
doaj +1 more source
Journal of Field Robotics, EarlyView.ABSTRACT Drone light shows (DLShows) represent a rapidly growing application of swarm robotics, creating captivating aerial displays through the synchronized flight of hundreds or thousands of unmanned aerial vehicles (UAVs) as environmentally friendly and reusable alternatives to traditional pyrotechnics.
Yunes Alqudsi
wiley +1 more source
Centimeter-Level Orbit Determination for TG02 Spacelab Using Onboard GNSS Data
Sensors, 2018 Tiangong-2, the second Chinese manned spacecraft, was launched into low Earth orbit on 15 September 2016. The dual-frequency geodetic GNSS receiver equipped on it is supporting a number of scientific experiments in orbit. This paper uses the onboard GNSS
Kai Li +6 more
doaj +1 more source
Path‐Based Deep Reinforcement Learning for On‐Board Routing in Satellite Constellation Networks
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Efficient usage of available network resources is a crucial factor for broadband services in interconnected satellite constellations. To meet required quality of service standards under heavy network loads, it is essential to optimize traffic distribution among the intersatellite links. To address this challenge, we propose an adaptive traffic
Manuel M. H. Roth +4 more
wiley +1 more source
Multipath Estimation in Urban Environments from Joint GNSS Receivers and LiDAR Sensors
Sensors, 2012 In this paper, multipath error on Global Navigation Satellite System (GNSS) signals in urban environments is characterized with the help of Light Detection and Ranging (LiDAR) measurements. For this purpose, LiDAR equipment and Global Positioning System (
Antonio J. Fernández +4 more
doaj +1 more source
Directive Antenna Clutter Loss in Slant Paths
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This paper investigates the development of a clutter loss model specifically for slant paths involving directive antennas. Conventionally, clutter loss is characterized by using isotropic antennas to facilitate standard link budget calculations via single antenna gain values.
Fernando Pérez Fontán +4 more
wiley +1 more source
Modified RTK-GNSS for Challenging Environments
SensorsReal-Time Kinematic Global Navigation Satellite System (RTK-GNSS) is currently the premier technique for achieving centimeter-level accuracy quickly and easily.
Ellarizza Fredeluces +3 more
doaj +1 more source