Tuan, Pham Viet, Hoang Dai Long, Pham Ngoc Son, and Mai T. P. Le. 2026. “A Spectral Efficiency Design for Active IRS-Assisted SWIPT System via Semidefinite Relaxation Method”. Journal of Telecommunications and Information Technology 103 (1): 40-49. https://doi.org/10.26636/jtit.2026.1.2267.