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RIS-Aided Cell-Free Massive MIMO Systems: Joint Design of Transmit Beamforming and Phase Shifts


Dec 13, 2021
Si-Nian Jin , Dian-Wu Yue , Ha H. Nguyen

* 13 pages, 10 figures. Submitted to IEEE for possible publication 

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Joint Cluster Head Selection and Trajectory Planning in UAV-Aided IoT Networks by Reinforcement Learning with Sequential Model


Dec 01, 2021
Botao Zhu , Ebrahim Bedeer , Ha H. Nguyen , Robert Barton , Jerome Henry

* This paper has been accepted in IEEE IoT-J 

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Concurrent Transmission and Multiuser Detection of LoRa Signals


Nov 19, 2021
The Khai Nguyen , Ha H. Nguyen , Ebrahim Bedeer

* 11 pages, 7 figures, submitted to IEEE for possible publication 

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Angle Estimation for Terahertz Ultra-Massive MIMO-Based Space-to-Air Communications


Aug 02, 2021
Anwen Liao , Zhen Gao , Yang Yang , Ha H. Nguyen , Hua Wang , Hao Yin

* Accepted by IEEE/CIC International Conference on Communications in China. arXiv admin note: text overlap with arXiv:2103.01829 

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UAV Trajectory Planning in Wireless Sensor Networks for Energy Consumption Minimization by Deep Reinforcement Learning


Aug 01, 2021
Botao Zhu , Ebrahim Bedeer , Ha H. Nguyen , Robert Barton , Jerome Henry

* IEEE TVT, 2021 

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Design of Non-Coherent and Coherent Receivers for Chirp Spread Spectrum Systems


May 06, 2021
Tung T. Nguyen , Ha H. Nguyen

* The main ideas and algorithms presented in this paper were originally described in a technical report accompanying a U.S. provisional patent application no. 62/672,778, submitted in May 2018 

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Performance Improvement of LoRa Modulation with Signal Combining


Feb 23, 2021
The Khai Nguyen , Ha H. Nguyen , Ebrahim Bedeer

* 5 pages, submitted to journal publications 

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Frequency-Shift Chirp Spread Spectrum Communications with Index Modulation


Feb 09, 2021
Muhammad Hanif , Ha H. Nguyen

* The first version of this paper was submitted to IEEE Internet of Things Journal on July 14, 2020. The revised version was submitted on October 28, 2020 and is under further revision. The main idea and results of this work were filed in a US Patent Application US2020/0358475A1 (www.freepatentsonline.com/20200358475.pdf

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Performance Analysis and Optimization of Bidirectional Overlay Cognitive Radio Networks with Hybrid-SWIPT


Jan 06, 2021
Addanki Prathima , Devendra Singh Gurjar , Ha H. Nguyen , Ajay Bhardwaj

* IEEE Trans. Veh. Technol., vol. 69, no. 11, pp. 13467-13481, Nov. 2020 
* 15 pages, 12 figures 

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