Journal Papers
Conference Papers
2025
W. Khalid, T. V. Chien, W. U. Khan, Z. Kaleem, Y. B. Zikria, T. Kim, H. Yu, "Malicious Reconfigurable Intelligent Surfaces: Security Threats in 6G Networks," IEEE Internet of Things Journal. [IF: 10.6][Top 3%]
W. Khalid, A.-A. A. Boulogeorgos, T. V. Chien, J. Lee, H. Lee, and H. Yu, "Optimal Operation of Active RIS-Aided Wireless Powered Communications in IoT Networks," IEEE Internet of Things Journal. [IF: 10.6][Top 3%]
Zeeshan Kaleem, Misha Urooj Khan, Ahmad Suleman, W. Khalid, Kai-Kit Wong, Chau Yuen, "Quantum Skyshield: Quantum Key Distribution and Post-Quantum Authentication for Low-Altitude Wireless Networks in Adverse Skies," IEEE Wireless Communications Magazine [IF: 11.5][Top 3%]
V. Kouvakis, S.E. Trevlakis, A.A.A. Boulogeorgos, H. Liu, W. Khalid, T.A. Tsiftsis, "Hierarchical Blockchain Radio Access Networks: Architecture, Modelling, and Performance Assessment," IEEE Open Journal of the Communications Society. [IF: 6.3]
M. Zia Ul Haq, Nadia N. Qadri, Omer Chughtai, Sadiq Ahmad, W. Khalid (Corresponding author), Heejung Yu "Adaptive Network Selection for Enhanced Connectivity in Vehicular-to-Everything (V2x) Communications," IEEE Access. [IF: 3.9]
W. Khalid, H. Yu, F. Ali, and H. Huang, "Active RIS-aided terahertz communications with phase error and beam misalignment," 2024 15th International Conference on Information and Communication Technology Convergence (ICTC), Oct. 16– 18, 2024, Jeju, Korea.
W. Khalid, H. Yu "RIS-Aided NOMA Downlink Networks: A DRL-Based Approach" 35th Joint Conference on Communications and Information, April 23~25, 2025, Sokcho, Korea.
W. Khalid, "DRL-Based Approach for RIS-Aided NOMA System in Short Packet Communications" 8th International Conference on Circuits, Systems and Simulation (ICCSS), Ho Chi Minh City, Vietnam, May 16-18, 2025.
2024
W Khalid, M.A. Rehman; T.V. Chien, Z. Kaleem, H. Lee, H. Yu, "Reconfigurable Intelligent Surface for Physical Layer Security in 6G-IoT: Designs, Issues, and Advances," IEEE Internet of Things Journal. [IF: 10.6][Top 3%]
B. D. Son, T. V. Chien, W. Khalid, M. Amine Ferrag, W. Choi, and M. Debbah, "Adversarial Attacks and Defenses in 6G Network-Assisted IoT Systems," IEEE Internet of Things Journal. [IF: 10.6][Top 3%]
T. V. Chien, L. T. Tu, W. Khalid, H. Yu, S. Chatzinotas, and M. D. Renzo, "RIS-Assisted Wireless Communications: Long-Term versus Short-Term Phase Shift Designs," IEEE Transactions on Communication. [IF: 8.3][Top 8%]
J. Bae, W. Khalid (Co-first author), A. Lee, H. Lee, S. Noh, and H. Yu, "Overview of RIS-enabled secure transmission in 6G wireless networks," Digital Communications and Networks. [IF: 7.5]
Z. Kaleem, W. Khalid, A. Ahmad, H. Yu, A. Almasoud, C. Yuen, "Reinforcement Learning for Energy-Efficient User Association in UAV-Assisted Cellular Networks," IEEE Transactions on Aerospace and Electronic Systems. [IF: 5.1][Top 9%]
N. Khan, W. Khalid (Corresponding author), et al., "Efficient UAVs Deployment and Resource Allocation for Video Transmission in UAV-Relay Assisted Public Safety Networks," IEEE Access. [IF: 3. 9]
MRA Ruko, M Ibrahim, ASM Badrudduza, IS Ansari, W Khalid, H Yu, "Effects of Co-channel Interference on RIS Empowered Wireless Networks amid Multiple Eavesdropping Attempts," ICT Express. [IF: 4. 1]
H. Yu, W. Khalid, et al., "A Robust System and Model for Multi-Class and Multi-Target Drone Detection," Patent (Patent number: 10-2707632), South Korea, Date: 2024/9/11 https://k-knowledge.kr/srch/read.jsp?id=261309519.
W. Khalid, H. Yu, and A. Alexandros, "Outage Analysis for Active Reconfigurable Intelligent Surface-Enhanced Wireless Powered Communication Networks," ICAIIC, Feb. 19– 22, 2024, Osaka, Japan.
W Khalid, M Nair, H Yu, T V Chien, "Impact of RIS on Outage Probability and Ergodic Rate in Wireless Powered Communication," ICTC, Jeju, South Korea. Oct 11-23. 2023.
W. Khalid, H. Yu, and Y.A. Qadri, "Active Reconfigurable Intelligent Surface-Aided Terahertz Wireless Communications," KICS Summer Conference, Jun. 19– 22, 2024, Jeju, Korea.
M. A. Rehman, W. Khalid, M. A.-Khalidia, and B. S. Kim. "A Rule-based Intrusion Detection System for NDN-based VANETs,", in 2024 IEEE 21st International Conference on Mobile Ad-Hoc and Smart Systems (MASS), 25 Sept. 2024, Seoul, Korea
2023
W Khalid, Z Kaleem, R Ullah, T Chien, S Noh, and H Yu. "Simultaneous Transmitting and Reflecting-Reconfigurable Intelligent Surface in 6G: Design Guidelines and Future Perspectives," IEEE Network. [IF: 10.294][Top 5%]
S. Fayyaz; MAU Rehman; W. Khalid, B.-S. Kim, "SHM-NDN: A Seamless Hybrid Mobility Management Scheme for Named Data Mobile Ad hoc Networks," Internet of Things. [IF: 6.0]
M Misbah, Z Kaleem, W Khalid, C Yuen, and A Jamalipour. "Phase and 3D Placement Optimization for Rate Enhancement in RIS-Assisted UAV Networks," IEEE Wireless Communications Letters. [IF: 6.3]
M Shahjalal, W Kim, W Khalid, S Moon, M Khan, S Liu, S Lim, E Kim, D Yun, J Lee, W Lee, S Hwang, D Kim, J Lee, H Yu, Y Sung, and Y Jang. "Enabling technologies for AI-empowered 6G massive radio access networks," ICT Express. [IF: 4. 1]
W Khalid, M. Atif, T Chien, and H Yu. "Simultaneously Transmitting and Reflecting-Reconfigurable Intelligent Surfaces with Hardware Impairment and Phase Error," ICAIIC, Bali, Indonesia, Feb. 2023
M Misbah, M Dil, W Khalid, Z Kaleem. "RF-NeuralNet: Lightweight Deep Learning Framework for Detecting Rogue Drones from Radio Frequency Signatures," ICACR, 4-6 Aug. 2023, Kuala Lumpur, Malaysia
W Khalid, A Karim, H Yu. "STAR-RIS: Applications and Research Issues," KICS Winter Conference, Feb. 2023, Yongpyong Resort, Gangwon-do, South Korea.
W. Khalid, and H. Yu. "Coverage Probability Analysis for Active RIS-Assisted Vehicular Communications," KICS Fall Conference, Nov. 2023, Gyeongju, Korea
W. Khalid et al., "STAR-RIS-Assisted Wireless Communications in Downlink NOMA Networks," KICS Summer Conference, Jun. 2023, Jeju, South Korea
2022
W Khalid, H Yu, C Juphil, Z Kaleem, S Ahmad. "Rate-Energy Tradeoff Analysis in RIS-SWIPT Systems with Hardware Impairments and Phase-Based Amplitude Response," IEEE Access. [IF: 3. 9]
Z Kaleem, W Khalid, A Muqaibel, A Nasir, C Yuen, K Karagiannidis. "Learning-Aided UAV 3D Placement and Power Allocation for Sum-Capacity Enhancement under Varying Altitudes," IEEE Communications Letters. [IF: 4.1]
W Khalid, M Shahjalal, H Yu. "Outage Performance Analysis of Hybrid Relay-Reconfigurable Intelligent Surface Networks," APCC, 19-21 Oct. 2022, Jeju, Korea
2021
W Khalid, H Yu, DT Do, Z Kaleem, S Noh. "RIS-Aided Physical Layer Security with Full-Duplex Jamming in Underlay D2D Networks," IEEE Access. [IF: 3. 9]
W Khalid, H Yu. "Security Improvement With QoS Provisioning Using Service Priority and Power Allocation for NOMA-IoT Networks," IEEE Access. [IF: 3. 9]
W Khalid, H Yu, R Ali, R Ullah. "Advanced Physical-Layer Technologies for Beyond 5G Wireless Communication Networks," Sensors. [IF: 3. 4]
CB Le, DT Do, A Silva, WU Khan, W Khalid, H Yu, ND Hguyen. "Joint Design of Improved Spectrum and Energy Efficiency with Backscatter NOMA for IoT," IEEE Access. [IF: 3. 9]
Z Kaleem, M Ali, I Ahmad, W Khalid, A Alkhayyat, A Jamalipour. "Artificial Intelligence-Driven Real-Time Automatic Modulation Classification Scheme for Next-Generation Cellular Networks," IEEE Access. [IF: 3. 9]
HB Chikha, A Almadhor, W Khalid. "Machine Learning for 5G MIMO Modulation Detection," Sensors. [IF: 3. 4]
W Khalid, H Yu. "On the Impact of Transceiver Impairments and Reflecting Elements for RIS-Aided Communications," ICTC, 20-22 Oct. 2021, Jeju, South Korea.
W Khalid, H Yu. "Capacity Analysis of RIS-based Communications Under Transceiver Impairments," KICS, Jeju, South Korea.
2020
W Khalid, H Yu, S Noh. "Residual Energy Analysis in Cognitive Radios with Energy Harvesting UAV under Reliability and Secrecy Constraints," Sensors. [IF: 3. 4]
W Khalid, H Yu. "Residual Energy Analysis with Physical-Layer Security for Energy-Constrained UAV Cognitive Radio Systems," ICEIC, 19-22 Jan. 2020, Barcelona, Spain.
W Khalid, H Yu, J Joung. "Physical Layer Security for Hybrid-ARQ Protocols with Massive Antennas," KICS Winter Conference, Yongpyong Resort, Gangwon-do, South Korea.
2019
W Khalid, H Yu. "Spatial-Temporal Sensing and Utilization in Full-Duplex Spectrum-Heterogeneous Cognitive Radio Networks for the Internet of Things," Sensors. [IF: 3. 4]
Utilization of spectrum with imperfect sensing for cognitive radio-based network. Thesis (Doctoral) Yeungnam University: 학위논문(박사): 영남대학교 대학원: 정보통신공학과 정보통신공학전공 http://yu.dcollection.net/public_resource/pdf/200000230370_20221126163348.pdf.
W Khalid, H Yu. "Sensing and Utilization of Spectrum with Cooperation Interference for Full-Duplex Cognitive Radio Networks," ICUFN, 2-5 Jul. 2019, Zagreb, Croatia.
~ 2018
W Khalid, H Yu. "Sum Utilization of Spectrum with Spectrum Handoff and Imperfect Sensing in Interweave Multi-Channel Cognitive Radio Networks," Sustainability [IF: 3. 3].
W Khalid, H Yu. "Optimal Sensing Performance for Cooperative and Non-Cooperative Cognitive Radio Networks," Intern. J. of Distributed Sensor Networks (IJDSN) [IF: 2. 3].
W Khalid, H Yu, YB Zikria. "Improvement of Spectrum Utilization with Retransmission in Cognitive Radio Networks: Analytical Approach," ICUMT, Munich, Germany (2018).
W Khalid, H Yu. "Performance Analysis of FD Communication Modes in Non-Time Slotted Cognitive Radio Networks," Intern. Workshop on Emerging ICT, Yeungnam University, Gyeongsan, South Korea (2018).
W Khalid, H Yu. "Optimal Analysis for Sum-Utilization and Sum-Rate in Cognitive Radio Networks with Different PU Activities," APWCS, Incheon, South Korea (2017).
R Ali, M Usman Ali, W Khalid, BS Kim. "Future WLANS: A Candidate for Smart Homes in Internet Of Things (IoT)," ICACCI, Daegu, Korea (2017).
W Khalid, H Yu. "Optimal Cooperative Sensing in Cognitive Radio Networks," in 한국통신학회 학술대회논문집 (Journal of the Korean Institute of Communication Sciences), pp. 844-845 (2017).
H Yu, W Khalid. "Secure Communication with Beamforming and Jamming in Time-Varying Channels," ICUFN, 5-8 Jul. 2016, Vienna, Austria (2016).
W Khalid, KS Kwak. "Handover Optimization in Femtocell Networks," ICTC, Jeju, South Korea (Nov. 2014)