Power Minimization Strategy Based Subcarrier Allocation and Power Assignment for Integrated Sensing and Communication

• Published in: 2023 IEEE Wireless Communications and Networking Conference (WCNC) pp. 1 - 6
• Main Authors: Zhu, Jia, Cui, Yuanhao, Mu, Junsheng, Hu, Longyu, Jing, Xiaojun
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.03.2023
• Subjects: Convex functions; Design methodology; Integrated sensing and communication; Minimization; mutual information; Numerical simulation; OFDM; power assignment; Power demand; Quality of service; subcarrier allocation; Transforms
• ISSN: 1558-2612
• DOI: 10.1109/WCNC55385.2023.10118989

Integrated sensing and communication (ISAC) has received increasing attention as a potential technology to alleviate spectrum shortage. This paper studies the power-saving problem based on power assignment and subcarrier allocation in ISAC. Specifically, we propose a joint design method to jointly optimize the subcarrier and transmit power allocated to sensing services and communication services respectively. To ensure the quality of sensing service (SS) and communication service (CS), the minimum total power required by the system is obtained by optimizing the allocation of subcarriers and transmission power. Since the formulated problem is nonconvex, which is generally difficult to solve effectively. Inspired by the classical subcarrier allocation algorithm based on channel gain information, we decompose the formulated problem into two convex optimization subproblems that are easy to solve. Numerical simulation results show that the proposed algorithm can effectively improve the power-saving performance of the system compared with the existing algorithms.