94 citations · 280 across the 25 of their papers we have counts for
7 papers · 1 filter
D2D-aided LoRaWAN LR-FHSS in Direct-to-Satellite IoT Networks
Alireza Maleki, Ha H. Nguyen, Ebrahim Bedeer +1
In this paper, we present a device-to-device (D2D) transmission scheme for aiding long-range frequency hopping spread spectrum (LR-FHSS) LoRaWAN protocol with application in direct…
Concurrent Transmission and Multiuser Detection of LoRa Signals
The Khai Nguyen, Ha H. Nguyen, Ebrahim Bedeer
This paper investigates a new model to improve the scalability of low-power long-range (LoRa) networks by allowing multiple end devices (EDs) to simultaneously communicate with mul…
Performance Improvement of LoRa Modulation with Signal Combining and Semi-Coherent Detection
The Khai Nguyen, Ha H. Nguyen, Ebrahim Bedeer
In this paper, we investigate performance improvements of low-power long-range (LoRa) modulation when a gateway is equipped with multiple antennas. We derive the optimal decision r…
Wireless Information and Power Transfer for IoT Applications in Overlay Cognitive Radio Networks
Devendra Singh Gurjar, Ha H. Nguyen, Hoang D. Tuan
This paper proposes and investigates an overlay spectrum sharing system in conjunction with the simultaneous wireless information and power transfer (SWIPT) to enable communication…
Performance of Wireless Powered Cognitive Radio Sensor Networks With Nonlinear Energy Harvester
Devendra Singh Gurjar, Ha H. Nguyen, Prabina Pattanayak
This letter analyzes the performance of simultaneous wireless information-and-power transfer (SWIPT) in an overlay cognitive radio network (CRN) under Nakagami- fading. A pair o…
mmWave Doubly-Massive-MIMO Communications Enhanced with an Intelligent Reflecting Surface
Dian-Wu Yue, Ha H. Nguyen, Yu Sun
As a means to control wireless propagation environments, the use of emerging and novel intelligent reflecting surfaces (IRS) is envisioned to enhance and broaden many applications…
Multisensor Data Fusion for Water Quality Monitoring using Wireless Sensor Networks
Ebrahim Karami, Francis M. Bui, Ha H. Nguyen
In this paper, the application of hierarchical wireless sensor networks in water quality monitoring is investigated. Adopting a hierarchical structure, the set of sensors is divide…