Tootfinder

TSPC-PFD: TSPC-Based Low-Power High-Resolution CMOS Phase Frequency Detector
Dhandeep Challagundla, Venkata Krishna Vamsi Sundarapu, Ignatius Bezzam, Riadul Islam
https://arxiv.org/abs/2508.16933

TSPC-PFD: TSPC-Based Low-Power High-Resolution CMOS Phase Frequency Detector
Phase Frequency Detectors (PFDs) are essential components in Phase-Locked Loop (PLL) and Delay-Locked Loop (DLL) systems, responsible for comparing phase and frequency differences and generating up/down signals to regulate charge pumps and/or, consequently, Voltage-Controlled Oscillators (VCOs). Conventional PFD designs often suffer from significant dead zones and blind zones, which degrade phase detection accuracy and increase jitter in high-speed applications. This paper addresses PFD design …

Verizon signs a commercial agreement with AST SpaceMobile to offer satellite-to-phone connectivity in cellular dead zones starting in 2026; ASTS closes up 8.6% (Michael Kan/PCMag)
https://www.pcmag.com/news/forget-starlink-verizon-is-all-in…

T-Mobile expands its Starlink satellite service to support apps such as WhatsApp, Google Maps, and X, after launching it in July with basic features like SMS (Harshita Mary Varghese/Reuters)
https://www.reuters.com/business/media-tel

Traffic State Estimation in Congestion to Extend Applicability of DFOS
Yoshiyuki Yajima (NEC Corporation), Hemant Prasad (NEC Corporation), Daisuke Ikefuji (NEC Corporation), Hitoshi Sakurai (NEC Corporation), Manabu Otani (Central Nippon Expressway Company, Limited)
https://arxiv.org/abs/2508.21138

Traffic State Estimation in Congestion to Extend Applicability of DFOS
This paper presents a traffic state estimation (TSE) method in congestion for distributed fiber-optic sensing (DFOS). DFOS detects vehicle driving vibrations along the optical fiber and obtains their trajectories in the spatiotemporal plane. From these trajectories, DFOS provides mean velocities for real-time spatially continuous traffic monitoring without dead zones. However, when vehicle vibration intensities are insufficiently low due to slow speed, trajectories cannot be obtained, leading t…