Joint UAV Placement and IRS Phase Shift Optimization in Downlink Networks

no code implementations • 14 Jul 2022 • Hung Nguyen-Kha, Hieu V. Nguyen, Mai T. P. Le, Oh-Soon Shin

This study investigates the integration of an intelligent reflecting surface (IRS) into an unmanned aerial vehicle (UAV) platform to utilize the advantages of these leading technologies for sixth-generation communications, e. g., improved spectral and energy efficiency, extended network coverage, and flexible deployment.

A Novel Heap-based Pilot Assignment for Full Duplex Cell-Free Massive MIMO with Zero-Forcing

no code implementations • 8 Jul 2020 • Hieu V. Nguyen, Van-Dinh Nguyen, Octavia A. Dobre, Shree Krishna Sharma, Symeon Chatzinotas, Björn Ottersten, Oh-Soon Shin

This paper investigates the combined benefits of full-duplex (FD) and cell-free massive multiple-input multipleoutput (CF-mMIMO), where a large number of distributed access points (APs) having FD capability simultaneously serve numerous uplink and downlink user equipments (UEs) on the same time-frequency resources.

Robust Design

Dynamic User Pairing for Non-Orthogonal Multiple Access in Downlink Networks

no code implementations • 25 Jun 2020 • Kha-Hung Nguyen, Hieu V. Nguyen, Van-Phuc Bui, Oh-Soon Shin

This paper considers a downlink (DL) system where non-orthogonal multiple access (NOMA) beamforming and dynamic user pairing are jointly optimized to maximize the minimum throughput of all DL users.