Abstract Positioning, Navigation and Timing (PNT) are services generally provided by
Global Navigation Satellite Systems (GNSS). GNSS reside in medium to high orbital …

This paper summarizes current state-of-the-art navigation results with multi-constellation low
Earth orbit (LEO) satellite signals of opportunity. Experimental results with four LEO satellite …

A framework to exploit megaconstellation low Earth orbit (LEO) satellite signals of
opportunity for navigation is developed. This framework, termed simultaneous tracking and …

Positioning, Navigation, and Timing (PNT) is an essential service for modern societies, their
industries, and governmental organizations. Mobility, logistics, and agriculture, among …

A hybrid analytical-machine learning (ML) framework for improved low Earth orbit (LEO)
satellite orbit prediction is developed. The framework assumes the following three stages.(i) …

A receiver for blind beacon estimation of low Earth orbit (LEO) satellite signals with
application to UAV navigation is presented. The receiver operates in three stages:(i) blind …

An interacting multiple-model (IMM) estimator is developed to adaptively estimate the
process noise covariance of low Earth orbit (LEO) satellite clocks for improved positioning …

A comprehensive study is performed for low Earth orbit (LEO) space vehicles (SVs) tracking
by a receiver opportunistically extracting navigation observables from their downlink radio …

随着毫米波, 高通量卫星通信等技术日渐成熟, 及其对全球宽带通信服务的迫切需求,
低轨巨型通信星座建设受到极大关注, 高达数千颗卫星的低轨通信星座被部署 …

This paper studies the beamforming strategies of multiple-input multiple-output (MIMO)
Starlink low Earth orbit (LEO) satellites. Applying a maximum likelihood (ML) estimation …