Dynamic Energy-Efficient Power Allocation in Multibeam Satellite Systems

Autor:	Efrem, Christos N., Panagopoulos, Athanasios D.
Rok vydání:	2019
Předmět:	Computer Science - Networking and Internet Architecture Computer Science - Information Theory Electrical Engineering and Systems Science - Signal Processing
Zdroj:	IEEE Wireless Communications Letters, vol. 9, no. 2, pp. 228-231, Feb. 2020
Druh dokumentu:	Working Paper
DOI:	10.1109/LWC.2019.2949277
Popis:	Power consumption is a major limitation in the downlink of multibeam satellite systems, since it has a significant impact on the mass and lifetime of the satellite. In this context, we study a new energy-aware power allocation problem that aims to jointly minimize the unmet system capacity (USC) and total radiated power by means of multi-objective optimization. First, we transform the original nonconvex-nondifferentiable problem into an equivalent nonconvex-differentiable form by introducing auxiliary variables. Subsequently, we design a successive convex approximation (SCA) algorithm in order to attain a stationary point with reasonable complexity. Due to its fast convergence, this algorithm is suitable for dynamic resource allocation in emerging on-board processing technologies. In addition, we formally prove a new result about the complexity of the SCA method, in the general case, that complements the existing literature where the complexity of this method is only numerically analyzed. Comment: Accepted for publication in IEEE Wireless Communications Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1912.00920 Zobrazit plný text záznamu View this record from Arxiv