Advancements in satellite technology have made direct satellite-to-device connectivity a
viable solution for ensuring global access. This method is designed to provide internet …

In the 6G era, Space-Air-Ground Integrated Network (SAGIN) are anticipated to deliver
global coverage, necessitating support for a diverse array of emerging applications in high …

Low-Earth orbit (LEO) satellites can play an important role in providing seamless coverage
for the Internet of Things (IoT). In satellite-based IoT (SIoT) networks, IoT devices can …

With the advantages of low cost and flexible deployment, low earth orbit satellite (LEO-Sat)
communications have received widespread attentions, such as providing global wireless …

Orthogonal time frequency space (OTFS) modulation is strongly considered as a promising
solution for high-mobility communications. In contrast to conventional modulation …

In this paper, we investigate the massive multiple-input multiple-output orthogonal frequency
division multiplexing channel estimation for low-earth-orbit satellite communication systems …

Extensive work has demonstrated the excellent performance of orthogonal time frequency
space (OTFS) modulation in high-mobility scenarios. Time-variant wideband channel …

Low Earth orbit (LEO) satellite communications are the key enabler for achieving 6G
ubiquitous connectivity. With the rapid progress of small satellite technology and the surging …

Existing channel estimation techniques for orthogonal time frequency space (OTFS)
transmission are mostly based on the pilots embedded in the two-dimensional delay …

This paper investigates joint device identification, channel estimation, and symbol detection
for cooperative multi-satellite-enhanced random access, where orthogonal time-frequency …