Tootfinder

Doppler-Based Multistatic Drone Tracking via Cellular Downlink Signals
Chenqing Ji, Qionghui Liu, Jiahong Liu, Chao Yu, Yifei Sun, Rui Wang, Fan Liu
https://arxiv.org/abs/2509.25732

Doppler-Based Multistatic Drone Tracking via Cellular Downlink Signals
In this paper, a multistatic Doppler sensing system is proposed for the drone tracking via downlink Long-Term Evolution (LTE) signals. Specifically, the LTE base stations (BSs) are exploited as signal illuminators, and three passive sensing receivers are deployed at different locations to detect the bistatic Doppler frequencies of a target drone from received downlink signals. It is shown that even without the measurements of BS-drone-receiver range and angle, the Doppler measurements could pro…

🇺🇦 Auf radioeins läuft...
Vampire Weekend feat. Danielle Haim:
🎵 Married in a Gold Rush
#NowPlaying #VampireWeekend #DanielleHaim
https://open.spotify.com/track/4Ww4jdVXTyvSnryNTtReRJ

Afstandsnorm windmolens belemmert klimaat- en bouwdoelen | #VNG
https://vng.nl/nieuws/afstandsnorm-windmolens-belemmert-klimaat-en-bouwdoelen
VNG wil dat …

on the topic of #posiwid, I much too frequently repost Mitchell and Webb's brilliant sketch: The Death Ray
#helpfulbullets #doommelon
https://www.youtube.com/watch?v=8HgejSCHRi8

An Implementation of Multi-User MIMO Downlink for O-RAN 5G New Radio using OpenAirInterface
Duc Tung Bui, Le-Nam Tran
https://arxiv.org/abs/2509.25512 https://

An Implementation of Multi-User MIMO Downlink for O-RAN 5G New Radio using OpenAirInterface
We present the first implementation of a Multi-User Multiple-Input Multiple-Output (MU-MIMO) transmission scheme on the Physical Downlink Shared Channel (PDSCH) for 5G Open Radio Access Network (O-RAN) based on OpenAirInterface (OAI). Our implementation features a fully functional O-RAN-compliant 5G New Radio (5G NR) system, including a 5G Core Network (5G CN), a refined 5G RAN, which is split into a Centre Unit (CU) and an Distributed Unit (DU), and 5G NR User Equipment (UEs). This implementat…

Balanced player arrangement in rotating court games
Alessandro Danelon
https://arxiv.org/abs/2509.23884 https://arxiv.org/pdf/2509.23884

Balanced player arrangement in rotating court games
Consider a game involving a team with $n$ players, $k$ of which wear shirts marked with a letter $A$, while the others with a letter $B$, and such that only $s$ people play, while the remaining $n-s$ wait outside the court. At certain times the players rotate, and one player enters the court while another one leaves, each player keeping the same neighbors at all times. The house rules want at least $t$ players wearing a shirt with the letter $A$ in the court at each rotation. We show that this …

Analysis of the carbon footprint of HPC
Abdessalam Benhari (DATAMOVE), Yves Denneulin (DATAMOVE), Fr\'ed\'eric Desprez (DATAMOVE), Fanny Dufoss\'e (DATAMOVE), Denis Trystram (DATAMOVE)
https://arxiv.org/abs/2509.22679

Analysis of the carbon footprint of HPC
The demand in computing power has never stopped growing over the years. Today, the performance of the most powerful systems exceeds the exascale. Unfortunately, this growth also comes with ever-increasing energy costs, leading to a high carbon footprint. This paper investigates the evolution of high performance systems in terms of carbon emissions. A lot of studies focus on Top500 (and Green500) as the tip of an iceberg to identify trends in the domain in terms of computing performance. We prop…

Jelly-Patch: a Fast Format for Recording Changes in RDF Datasets
Piotr Sowinski, Kacper Grzymkowski, Anastasiya Danilenka
https://arxiv.org/abs/2507.23499 https://

Jelly-Patch: a Fast Format for Recording Changes in RDF Datasets
Recording data changes in RDF systems is a crucial capability, needed to support auditing, incremental backups, database replication, and event-driven workflows. In large-scale and low-latency RDF applications, the high volume and frequency of updates can cause performance bottlenecks in the serialization and transmission of changes. To alleviate this, we propose Jelly-Patch -- a high-performance, compressed binary serialization format for changes in RDF datasets. To evaluate its performance, w…

Two Brief Geometric Derivations of the Shklovskii Effect in Pulsars
Thomas Donlon II
https://arxiv.org/abs/2509.22933 https://arxiv.org/pdf/2509.22933

Two Brief Geometric Derivations of the Shklovskii Effect in Pulsars
I provide two short derivations for the Shklovskii effect, which describes the apparent secular period drift of a periodic source due to its motion on the sky. These derivations use easily visualizable geometry and calculus, and might be useful for those who wish to gain intuition for the subject.

A closed-loop $2\times4$ downlink MIMO Framework for 5G New Radio using OpenAirInterface
Duc Tung Bui, Le-Nam Tran
https://arxiv.org/abs/2509.25497 https://

A closed-loop $2\times4$ downlink MIMO Framework for 5G New Radio using OpenAirInterface
We present the first-of-a-kind closed-loop $2\times4$ MIMO implementation for the downlink of 5G Open RAN using OpenAirInterface (OAI), which is capable of transmitting up to two transmission layers. Our implementation is a fully functional 5G New Radio (5G NR) system, including the 5G Core Network (5G CN), 5G Radio Access Network (5G RAN), as well as 5G NR User Equipment (UEs). This serves as a foundational framework for further advancements in the context of emerging Open RAN (O-RAN) developm…