Results 41 to 50 of about 74,234 (189)
Performance Evaluation of Random Access Methods for IoT-over-Satellite
Remote Sensing, 2022 Low Earth orbit (LEO) satellite constellations are currently being explored to provide global and seamless coverage for IoT-over-Satellite applications. Random access techniques require low transmission overhead providing a compatible route for IoT-over ...
Chiu Chun Chan +2 more
doaj +1 more source
Multi-Objective Optimization for Power Efficient Full-Duplex Wireless Communication Systems
, 2015 In this paper, we investigate power efficient resource allocation algorithm design for multiuser wireless communication systems employing a full-duplex (FD) radio base station for serving multiple half-duplex (HD) downlink and uplink users simultaneously.
Ng, Derrick Wing Kwan +2 more
core +1 more source
Joint Multi-Cell Resource Allocation Using Pure Binary-Integer Programming for LTE Uplink
, 2014 Due to high system capacity requirement, 3GPP Long Term Evolution (LTE) is likely to adopt frequency reuse factor 1 at the cost of suffering severe inter-cell interference (ICI).
Cui, Qimei, Tao, Xiaofeng, Zhang, Tong
core +1 more source
Location‐Assisted Graph‐Based User Scheduling in Multi‐User MIMO LEO NTN Systems
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This paper addresses user clustering and scheduling for multi‐user MIMO low Earth orbit nonterrestrial network systems in full frequency reuse. Since the number of on‐ground user terminals is usually much higher than the number of on‐board LEO satellite antennas, user scheduling becomes a fundamental task.
Bilal Ahmad +4 more
wiley +1 more source
A dynamic uplink random access method based on non-orthogonal multiple access technology
Nantong Daxue xuebao. Ziran kexue banTo address access collisions caused by massive user access in networks, a dynamic uplink random access method based on non-orthogonal multiple access(NOMA) is proposed.
YANG Jing; LIU Yuxin; GAO Rui; ZHAO Jing; DONG Zhicheng; ZHANG Zhenghua
doaj +1 more source
IEEE Access, 2021 Machine-to-Machine (M2M) communication refers to autonomous communication among devices that aims for a massive number of connected devices. M2M communication can support ubiquitous communication and full mechanical automation, and it will change ...
Upendra Singh +4 more
doaj +1 more source
Advanced Fade Mitigation Techniques for Q/V Band SATCOM Systems
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Adaptive fade mitigation techniques, such as smart gateway diversity (SGD), are essential in addressing atmospheric fading affecting the operation of high throughput and very high throughput satellite systems at Ka‐band and beyond. Specifically, the Q/V‐band, offering up to 5 GHz of available spectrum, is very attractive for future high data ...
Marianna Biscarini +5 more
wiley +1 more source
Users First: A Robust Two-Level Learning of Power Control in Uplink Ultra-Dense HetNets
IEEE Access, 2020 In this article, power control of uplink connection in the ultra-dense heterogeneous networks (HetNets), which are studied as different types of access points (APs), is investigated.
Meruyert Makhanbet, Tiejun Lv
doaj +1 more source
IEEE Access, 2022 Cell selection in cellular networks is an important aspect that impacts the quality of service. The traditional cell selection mechanism is based on downlink received power.
Kaveh Ahmadi +3 more
doaj +1 more source
, 2018 We determine, for the first time, the requirement on channel reciprocity to activate uplink channel training, instead of downlink channel training, to achieve a higher data rate for the downlink transmission from a multi-antenna base station to a single ...
Li, Chunhui, Yan, Shihao, Yang, Nan
core +1 more source