Tootfinder

This https://arxiv.org/abs/2504.17433 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

On Geometric Shaping for 400 Gbps IM-DD Links with Laser Intensity Noise
We propose geometric shaping for IM-DD links dominated by relative intensity noise (RIN). For 400 Gbps links, our geometrically-shaped constellations result in error probability improvements that relaxes the RIN laser design by 3 dB.

Replaced article(s) found for cs.RO. https://arxiv.org/list/cs.RO/new
[2/2]:
- Agile, Autonomous Spacecraft Constellations with Disruption Tolerant Networking to Monitor Precip...
Sreeja Roy-Singh, Alan P. Li, Vinay Ravindra, Roderick Lammers, Marc Sanchez Net

Simulated impact on LSST data of Starlink V1.5 and V2 satellites
Phanindra Kandula, J. Anthony Tyson, Jacob Askari, Forrest Fankhauser
https://arxiv.org/abs/2506.19092

Simulated impact on LSST data of Starlink V1.5 and V2 satellites
The new Starlink V2 satellites incorporate improvements to the chassis brightness through dielectric mirrors, off-pointing solar arrays, and black paint on exposed components. For the general case in which the reflectivities are initially unknown, we simulate LSST operations and repeated photometry of every satellite in simulated model constellations. We derive a brightness model of the Starlink V2 satellite and study the simulated apparent brightness as a function of the satellite position rel…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
New Constellations:
🎵 Hot Blooded
#NewConstellations
https://open.spotify.com/track/6BI2GDwlQV32JZLgYPMlFM

Valuing Diffuse Global Public Goods from Satellite Constellations: Evidence from GPS and Airline Delays
Lev Ricanati
https://arxiv.org/abs/2506.08209 https…

Valuing Diffuse Global Public Goods from Satellite Constellations: Evidence from GPS and Airline Delays
This paper studies the welfare impact of discrete improvements to global public goods in the context of the Global Positioning System (GPS). Specifically, I find that by disabling Selective Availability in May, 2000, and thus significantly increasing the accuracy of GPS, the United States generated at least \$268 million (2000 dollars) of additional welfare gains. To quantify this welfare impact, I apply a difference-in-differences model to the Bureau of Transportation Statistics's Airline On-T…

SpaceTrack-TimeSeries: Time Series Dataset towards Satellite Orbit Analysis
Zhixin Guo, Qi Shi, Xiaofan Xu, Sixiang Shan, Limin Qin, Linqiang Ge, Rui Zhang, Ya Dai, Hua Zhu, Guowei Jiang
https://arxiv.org/abs/2506.13034

SpaceTrack-TimeSeries: Time Series Dataset towards Satellite Orbit Analysis
With the rapid advancement of aerospace technology and the large-scale deployment of low Earth orbit (LEO) satellite constellations, the challenges facing astronomical observations and deep space exploration have become increasingly pronounced. As a result, the demand for high-precision orbital data on space objects-along with comprehensive analyses of satellite positioning, constellation configurations, and deep space satellite dynamics-has grown more urgent. However, there remains a notable l…

This https://arxiv.org/abs/2409.08826 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Generalized Nearest Neighbor Decoding: General Input Constellation and a Case Study of Interference Suppression
In this work, generalized nearest neighbor decoding (GNND), a recently proposed receiver architecture, is studied for channels under general input constellations, and multiuser uplink interference suppression is employed as a case study for demonstrating its potential. In essence, GNND generalizes the well-known nearest neighbor decoding, by introducing a symbol-level memoryless processing step, which can be rendered seamlessly compatible with Gaussian channel-based decoders. First, criteria of…

🇺🇦 #NowPlaying on #BBC6Music's #CraigCharles
Darwin Deez:
🎵 Constellations
#DarwinDeez
https://darwindeez.bandcamp.com/album/constellations
https://open.spotify.com/track/4qPIuCTn17xMB2j0TL0tc2

Collaborative Beamforming for Communication Applications Using a Two-Element Fully-Wireless Open-Loop Coherent Distributed Array
Jason M. Merlo, Jeffrey A. Nanzer
https://arxiv.org/abs/2506.13014

Collaborative Beamforming for Communication Applications Using a Two-Element Fully-Wireless Open-Loop Coherent Distributed Array
In this work we demonstrate a proof of concept of a fully-wireless two-node open-loop coherent distributed communication system and evaluate its performance by transmitting QPSK , 64-, and 256-QAM constellations at a symbol rate of 2 MBd over a 58 m link in an urban environment. The system is implemented in a distributed manner with on-node processing using software-defined radios (SDRs) and wireless internode communication to share coordination information and does not rely on external time or…

Direct-to-Cell: A First Look into Starlink's Direct Satellite-to-Device Radio Access Network through Crowdsourced Measurements
Jorge Garcia-Cabeza, Javier Albert-Smet, Zoraida Frias, Luis Mendo, Santiago Andr\'es Azcoitia, Eduardo Yraola
https://arxiv.org/abs/2506.00283

Direct-to-Cell: A First Look into Starlink's Direct Satellite-to-Device Radio Access Network through Crowdsourced Measurements
Low Earth Orbit (LEO) satellite mega-constellations have recently emerged as a viable access solution for broadband services in underserved areas. In 2024, Direct Satellite-to-Device (DS2D) communications, which enable unmodified smartphones to connect directly to spaceborne base stations, entered large-scale beta testing, with Starlink globally leading deployments. This paper presents the first measurement study of commercial DS2D services. Using crowdsourced mobile network data collected in t…

Analyzing Localizability of LEO/MEO Hybrid Networks: A Stochastic Geometry Approach
Ruibo Wang, Mustafa A. Kishk, Howard H. Yang, Mohamed-Slim Alouini
https://arxiv.org/abs/2506.03151

Analyzing Localizability of LEO/MEO Hybrid Networks: A Stochastic Geometry Approach
With the increase in global positioning service demands and the requirement for more precise positioning, assisting existing medium and high orbit satellite-enabled positioning systems with low Earth orbit (LEO) satellites has garnered widespread attention. However, providing low computational complexity performance analysis for hybrid LEO/MEO massive satellite constellations remains a challenge. In this article, we introduce for the first time the application of stochastic geometry (SG) framew…