Tootfinder

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…

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…

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

learn 👇

Learning Zero Constellations for Binary MOCZ in Fading Channels
Anthony Joseph Perre, Parker Huggins, Alphan Sahin
https://arxiv.org/abs/2508.08571 https://

Learning Zero Constellations for Binary MOCZ in Fading Channels
In this work, we propose two methods to design zero constellations for binary modulation on conjugate-reciprocal zeros (BMOCZ). In the first approach, we treat constellation design as a multi-label binary classification problem and learn the zero locations for a direct zero-testing (DiZeT) decoder. In the second approach, we introduce a neural network (NN)-based decoder and jointly learn the decoder and zero constellation parameters. We show that the NN-based decoder can directly generalize to …

Global Optimization of Multi-Flyby Trajectories for Multi-Orbital-Plane Constellations Inspection
An-Yi Huang, Hong-Xin Shen, Zhao Li, Cong Sun, Chao Sheng, Zheng-Zhong Kuai
https://arxiv.org/abs/2507.02943

Global Optimization of Multi-Flyby Trajectories for Multi-Orbital-Plane Constellations Inspection
The rapid expansion of mega-constellations in low Earth orbits has posed significant challenges to space traffic management, necessitating periodic inspections of satellites to ensure the sustainability of the space environment when economically feasible. This study addresses the orbital design challenge associated with inspecting numerous satellites distributed across multiple orbital planes through flybys by proposing an innovative orbital-plane-based inspection strategy. The proposed methodo…

Onboard Neuromorphic Split Computing via Optical Links for LEO Remote Sensing
Zihang Song, Petar Popovski
https://arxiv.org/abs/2507.08490 https://

Onboard Neuromorphic Split Computing via Optical Links for LEO Remote Sensing
Low Earth orbit (LEO) satellite constellations increasingly require onboard intelligence under strict power and communication constraints. This paper proposes a neuromorphic split computing framework tailored for hierarchical LEO systems, where edge satellites perform event-driven sensing using dynamic vision sensors (DVS) and lightweight spiking neural network (SNN) encoders, while core satellites conduct inference using a powerful SNN decoder. A learned spike mapping scheme enables direct tra…

🇺🇦 #NowPlaying on KEXP's #AfternoonShow
New Constellations:
🎵 Hot Blooded
#NewConstellations
https://open.spotify.com/track/2FdHXMMJuJVpfw3nIToLRI

Near-realtime Earth Observation Via Starlink LEO Satellite Constellation
Bo Wu (University of Pittsburgh), Pengfei Zhou (University of Pittsburgh)
https://arxiv.org/abs/2508.10338

Near-realtime Earth Observation Via Starlink LEO Satellite Constellation
Earth observation (EO) satellites in Low Earth Orbit (LEO) are collecting vast amounts of data, which are invaluable for applications such as monitoring forest fires. However, data downloading from EO satellites faces significant challenges due to the limited number of ground stations and the brief communication windows with them. Conversely, emerging LEO constellations like Starlink have enabled continuous connectivity and revolutionized access for ordinary users globally, who can connect via …

Constellations are just old-school hallucinations.

Recoil-Constrained Scheduling of Non-Propulsive Payload Deployment for Mega-Constellations
Li Zhengrui, Li wenhao, Feng Guanhua, Yue Yuxian
https://arxiv.org/abs/2507.08251

Recoil-Constrained Scheduling of Non-Propulsive Payload Deployment for Mega-Constellations
This paper addresses the significant challenge of recoil momentum accumulation during non-propulsive payload deployment for low-Earth-orbit mega-constellations. An efficient phase-based approximation algorithm is introduced, leading to over 90% faster computation while maintaining maximum ejection velocity errors below 1%. The analysis highlights that cumulative recoil velocity is the primary factor governing deployment capability, with excess velocity being approximately half of the cumulative…

Satellite Constellations Exceed the Limits of Acceptable Brightness Established by the IAU
Anthony Mallama, Richard E. Cole
https://arxiv.org/abs/2507.00107

Satellite Constellations Exceed the Limits of Acceptable Brightness Established by the IAU
Brightness statistics for satellites of the Starlink, BlueBird, Qianfan, Guowang and OneWeb constellations are reported. The means and standard deviations are compared to acceptable limits set by the International Astronomical Union's Centre for the Protection of the Dark and Quiet Sky From Satellite Constellations Interference. Nearly all these spacecraft exceed the magnitude 7+ brightness limit pertaining to interference with professional research. Most also exceed the magnitude 6 reference w…

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…

🔊 #NowPlaying on #BBCRadio3:
#NewMusicShow
- Constellations at BCMG
Tom Service presents world premieres by Zubin Kanga and Anne Castex from the Constellations concert, given by Zubin, the Birmingham Contemporary Music Group and L'Instant Donné.
Relisten now 👇
https://www.bbc.co.uk/programmes/m002g1gz

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…

Ground-Based Verification Method for Pointing and Acquisition Performance of Space Optical Communication System with Sub-Second Acquisition Time
Jianmin Wang, Zhiqian Su, Bin Li, Weiran Zheng, Haochun Gao
https://arxiv.org/abs/2508.08950

Ground-Based Verification Method for Pointing and Acquisition Performance of Space Optical Communication System with Sub-Second Acquisition Time
To meet the urgent need for sub-second link establishment in inter-satellite and satellite-to-ground free space optical communication, this paper presents a periscope-type optical communication terminal and a ground-based verification scheme for its pointing accuracy and acquisition performance, thereby avoiding costly in-orbit tests. This ground-based measurement method takes the positions of stellar constellations in inertial space as its reference. By establishing a theoretical attitude dete…

Enhancing Mega-Satellite Networks with Generative Semantic Communication: A Networking Perspective
Binquan Guo, Wanting Yang, Zehui Xiong, Zhou Zhang, Baosheng Li, Zhu Han, Rahim Tafazolli, Tony Q. S. Quek
https://arxiv.org/abs/2508.07573

Enhancing Mega-Satellite Networks with Generative Semantic Communication: A Networking Perspective
The advance of direct satellite-to-device communication has positioned mega-satellite constellations as a cornerstone of 6G wireless communication, enabling seamless global connectivity even in remote and underserved areas. However, spectrum scarcity and capacity constraints imposed by the Shannon's classical information theory remain significant challenges for supporting the massive data demands of multimedia-rich wireless applications. Generative Semantic Communication (GSC), powered by artif…

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Suzzallo:
🎵 Constellations
#Suzzallo
https://suzzallo.bandcamp.com/track/constellations-2
https://open.spotify.com/track/2lS6JUfgIjxtx4kJKxJz0n

Satellites are closer than you think: A near field MIMO approach for Ground stations
Rohith Reddy Vennam, Luke Wilson, Ish Kumar Jain, Dinesh Bharadia
https://arxiv.org/abs/2508.09374

Satellites are closer than you think: A near field MIMO approach for Ground stations
The rapid growth of low Earth orbit (LEO) satellite constellations has revolutionized broadband access, earth observation, and direct-to-device connectivity. However, the expansion of ground station infrastructure has not kept pace, creating a critical bottleneck in satellite-to-ground backhaul capacity. Traditional parabolic dish antennas, though effective for geostationary (GEO) satellites, are ill-suited for dense, fastmoving LEO networks due to mechanical steering delays and their inability…

Industrial Viewpoints on RAN Technologies for 6G
Mansoor Shafi, Erik G. Larsson, Xingqin Lin, Dorin Panaitopol, Stefan Parkvall, Flavien Ronteix-Jacquet, Antti Toskala
https://arxiv.org/abs/2508.08225 …

Industrial Viewpoints on RAN Technologies for 6G
6G standardization is to start imminently, with commercial deployments expected before 2030. Its technical components and performance requirements are the focus of this article. Our emphasis is on the 6G radio access, especially MIMO, AI, waveforms, coding, signal constellations and integration with non-terrestrial networks. Whilst standardization has not yet formally started, the scope of the 6G study items has been defined. Our predictions in this paper are speculative as there are no results…

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

Stochastic Channel Models for Satellite Mega-Constellations
Brendon McBain, Yi Hong, Emanuele Viterbo
https://arxiv.org/abs/2507.20255 https://arxiv.org/pd…

Stochastic Channel Models for Satellite Mega-Constellations
A general satellite channel model is proposed for communications between a rapidly moving low Earth orbit (LEO) satellite in a mega-constellation and a stationary user on Earth. The channel uses a non-homogeneous binomial point process (NBPP) for modelling the satellite positions, marked with an ascending/descending binary random variable for modelling the satellite directions. Using the marked NBPP, we derive the probability distributions of power gain, propagation delay, and Doppler shift, re…

Space Environment and Debris: A Review of Micro-Meteoroids and Orbital Debris Impact Protection
Binkal Kumar Sharma, Harshitha Baskar
https://arxiv.org/abs/2508.03957 https://…

Space Environment and Debris: A Review of Micro-Meteoroids and Orbital Debris Impact Protection
The threat posed by MMOD to spacecraft has escalated with the growing density of orbital objects, driven by the proliferation of satellite constellations such as Starlink and OneWeb. This paper reviews the current challenges and advancements in MMOD impact protection, emphasizing innovations in shielding technologies. The synthesis of recent developments highlights the role of hybrid materials, additive manufacturing, and international collaboration in ensuring spacecraft resilience while promo…

Constellation as a Service: Tailored Connectivity Management in Direct-Satellite-to-Device Networks
Feng Wang, Shengyu Zhang, Een-Kee Hong, Tony Q. S. Quek
https://arxiv.org/abs/2507.00902

Constellation as a Service: Tailored Connectivity Management in Direct-Satellite-to-Device Networks
Direct-satellite-to-device (DS2D) communication is emerging as a promising solution for global mobile service extension, leveraging the deployment of satellite constellations. However, the challenge of managing DS2D connectivity for multi-constellations becomes outstanding, including high interference and frequent handovers caused by multi-coverage overlap and rapid satellite movement. Moreover, existing approaches primarily operate within single-constellation shell, which inherently limits the…

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

Data Transmission over a Bosonic Arbitrarily Varying Quantum Channel
Janis N\"otzel, Florian Seitz
https://arxiv.org/abs/2507.18259 https://arxiv.org/…

Data Transmission over a Bosonic Arbitrarily Varying Quantum Channel
Arbitrarily varying channels offer a powerful framework for analyzing the robustness of quantum communication systems, especially for classical-quantum models, where the analysis displays strengths or weaknesses of specific signal constellations under generic attacks. In this work, we provide a coding theorem for a large class of practically relevant arbitrarily varying channel models. Namely, we give an explicit capacity formula for the lossy bosonic channel subject to semi-classical attacks, …

PHandover: Parallel Handover in Mobile Satellite Network
Jiasheng Wu, Shaojie Su, Wenjun Zhu, Xiong Wang, Jingjing Zhang, Xingqiu He, Yue Gao
https://arxiv.org/abs/2507.07437

PHandover: Parallel Handover in Mobile Satellite Network
The construction of Low Earth Orbit (LEO) satellite constellations has recently attracted tremendous attention from both academia and industry. The 5G and 6G standards have identified LEO satellite networks as a key component of future mobile networks. However, due to the high-speed movement of satellites, ground terminals often experience frequent and high-latency handovers, which significantly deteriorate the performance of latency-sensitive applications. To address this challenge, we propose…

need to relentlessly travel around the entire world till my spirit ascends and becomes embodied in constellations used for spiritual practices by the dene peoples of alaska and northwest canada

🇺🇦 #NowPlaying on KEXP's #VarietyMix
New Constellations:
🎵 Hot Blooded
#NewConstellations
https://open.spotify.com/track/2FdHXMMJuJVpfw3nIToLRI

Dynamic Activation and Assignment of SDN Controllers in LEO Satellite Constellations
Wafa Hasanain, Pablo G. Madoery, Halim Yanikomeroglu, Gunes Karabulut Kurt, Sameera Siddiqui, Stephane Martel, Khaled Ahmed, Colin Bellinger
https://arxiv.org/abs/2507.16774

Dynamic Activation and Assignment of SDN Controllers in LEO Satellite Constellations
Software-defined networking (SDN) has emerged as a promising approach for managing traditional satellite communication. This enhances opportunities for future services, including integrating satellite and terrestrial networks. In this paper, we have developed an SDN-enabled framework for Low Earth Orbit (LEO) satellite networks, incorporating the OpenFlow protocol, all within an OMNeT++ simulation environment. Dynamic controller assignment is one of the most significant challenges for large LEO…

Replaced article(s) found for cs.IT. https://arxiv.org/list/cs.IT/new
[1/1]:
- Stochastic Geometry and Dynamical System Analysis of Walker Satellite Constellations
Chang-Sik Choi, Francois Baccelli

OpenSN: An Open Source Library for Emulating LEO Satellite Networks
Wenhao Lu, Zhiyuan Wang, Hefan Zhang, Shan Zhang, Hongbin Luo
https://arxiv.org/abs/2507.03248

OpenSN: An Open Source Library for Emulating LEO Satellite Networks
Low-earth-orbit (LEO) satellite constellations (e.g., Starlink) are becoming a necessary component of future Internet. There have been increasing studies on LEO satellite networking. It is a crucial problem how to evaluate these studies in a systematic and reproducible manner. In this paper, we present OpenSN, i.e., an open source library for emulating large-scale satellite network (SN). Different from Mininet-based SN emulators (e.g., LeoEM), OpenSN adopts container-based virtualization, thus …

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…

All-Optical Inter-Satellite Relays with Intelligent Beam Control: Harnessing Liquid Lenses and Optical Hard Limiters
Mohammad Taghi Dabiri, Mazen Hasna, Saud Althunibat, Khalid Qaraqe
https://arxiv.org/abs/2506.23432

All-Optical Inter-Satellite Relays with Intelligent Beam Control: Harnessing Liquid Lenses and Optical Hard Limiters
Low Earth orbit (LEO) satellite constellations are emerging as a key enabler of next-generation communications, offering global coverage and significantly lower latency compared to traditional terrestrial networks and geostationary satellites. However, further latency reduction is essential for time-critical applications such as real-time sensing, autonomous systems, and interactive services. One critical bottleneck is the optical-to-electrical (O/E) and electrical-to-optical (E/O) conversions …

Parallax QAMA: Novel Downlink Multiple Access for MISO Systems with Simple Receivers
Jie Huang, Ming Zhao, Shengli Zhou, Ling Qiu, Jinkang Zhu
https://arxiv.org/abs/2506.23301

Parallax QAMA: Novel Downlink Multiple Access for MISO Systems with Simple Receivers
In this paper, we propose a novel downlink multiple access system with a multi-antenna transmitter and two single-antenna receivers, inspired by the underlying principles of hierarchical quadrature amplitude modulation (H-QAM) based multiple access (QAMA) and space-division multiple access (SDMA). In the proposed scheme, coded bits from two users are split and assigned to one shared symbol and two private symbols carried by different beams. Based on joint symbol mapping of H-QAM constellations …

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…

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.

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…

Space Shift Keying-Enabled ISAC for Efficient Debris Detection and Communication in LEO Satellite Networks
Gedeon Ghislain Nkwewo Ngoufo, Khaled Humadi, Elham Baladi, Gunes Karabulut Kurt
https://arxiv.org/abs/2507.13526

Space Shift Keying-Enabled ISAC for Efficient Debris Detection and Communication in LEO Satellite Networks
The proliferation of space debris in low Earth orbit (LEO) presents critical challenges for orbital safety, particularly for satellite constellations. Integrated sensing and communication (ISAC) systems provide a promising dual function solution by enabling both environmental sensing and data communication. This study explores the use of space shift keying (SSK) modulation within ISAC frameworks, evaluating its performance when combined with sinusoidal and chirp radar waveforms. SSK is particul…

Dora: A Controller Provisioning Strategy in Hierarchical Domain-based Satellite Networks
Qiyuan Peng, Qi Zhang, Yue Gao, Kun Qiu
https://arxiv.org/abs/2507.14512

Dora: A Controller Provisioning Strategy in Hierarchical Domain-based Satellite Networks
The rapid proliferation of satellite constellations in Space-Air-Ground Integrated Networks (SAGIN) presents significant challenges for network management. Conventional flat network architectures struggle with synchronization and data transmission across massive distributed nodes. In response, hierarchical domain-based satellite network architectures have emerged as a scalable solution, highlighting the critical importance of controller provisioning strategies. However, existing network managem…