Optimal SIC Decoding Order and WPT Time Length for WPCN With Imperfect SIC

• Published in: IEEE wireless communications letters Vol. 10; no. 10; pp. 2170 - 2174
• Main Authors: M. Lima, F. Rafael, Bastos, Josefran de O., Melo, Jhenifer de O.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-10-2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Decoding; imperfect SIC; NOMA; Nonorthogonal multiple access; Optimization; SIC decoding order; Silicon carbide; Uplink; Wireless communication; Wireless communications; Wireless networks; Wireless power transmission; Wireless sensor networks; WPCN; WPT
• ISSN: 2162-2337; 2162-2345
• DOI: 10.1109/LWC.2021.3095414

Wireless Power Transfer (WPT) and Non-Orthogonal Multiple Access (NOMA) are two emerging technologies towards next generation wireless networks. In this letter we assume the integration of those two technologies in Wireless Powered Communication Network (WPCN). We evaluate the impact of WPT time length and Successive Interference Cancellation (SIC) decoding order for an arbitrary number of terminals by assuming imperfect SIC. The optimal solution can be obtained by optimization solvers whereas a suboptimal solution is conceived based on analytical insights. Numerical results show that the decoding order is relevant for spectral efficiency maximization when imperfect SIC is assumed. Also, the proposed low-complexity solution shows a quasi-optimal performance.