6 papers · 1 filter
Random Access for LEO Satellite Communication Systems via Deep Learning
Hyunwoo Lee, Ian P. Roberts, Jinkyo Jeong +1
Integrating contention-based random access procedures into low Earth orbit (LEO) satellite communication (SatCom) systems poses new challenges, including long propagation delays, l…
Satellite Assignment Policy Learning for Coexistence in LEO Networks
Jeong Min Kong, Eunsun Kim, Ian P. Roberts
Unlike in terrestrial cellular networks, certain frequency bands for low-earth orbit (LEO) satellite systems have thus far been allocated on a non-exclusive basis. In this context,…
Satellite Selection for In-Band Coexistence of Dense LEO Networks
Eunsun Kim, Ian P. Roberts, Taekyun Lee +1
We study spectrum sharing between two dense low-earth orbit (LEO) satellite constellations, an incumbent primary system and a secondary system that must respect interference protec…
Can TDD Be Employed in LEO SatCom Systems? Challenges and Potential Approaches
Hyunwoo Lee, Ian P. Roberts, Jehyun Heo +4
Frequency-division duplexing (FDD) remains the de facto standard in modern low Earth orbit (LEO) satellite communication (SatCom) systems, such as SpaceX's Starlink, OneWeb, and Am…
Beam Tracking for Full-Duplex User Terminals in Low Earth Orbit Satellite Communication Systems
Chaeyeon Kim, Joohyun Son, Daesik Hong +1
This paper introduces a novel beam tracking scheme for full-duplex ground user terminals aiming to transmit uplink and receive downlink from two low Earth orbit (LEO) satellites at…
Feasibility Analysis of In-Band Coexistence in Dense LEO Satellite Communication Systems
Eunsun Kim, Ian P. Roberts, Jeffrey G. Andrews
This work provides a rigorous methodology for assessing the feasibility of spectrum sharing between large low-earth orbit (LEO) satellite constellations. For concreteness, we focus…