2016/07/26 by Yirui Cong, Cong, Yirui, Xiangyun Zhou +1
Computer Science · Engineering · Mathematics · #Advanced MIMO Systems Optimization #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Power Transfer Systems #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1607.07508
6 pages, 6 figures, accepted for publication in Globecom'16
arxiv created 2016/07/26 · openalex publication_date 2016/07/26 · arxiv updated 2016/07/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper investigates the offline packet-delay-minimization problem for an energy harvesting transmitter. To overcome the non-convexity of the problem, we propose a C2-diffeomorphic transformation and provide the necessary and sufficient condition for the transformed problem to a standard convex optimization problem. Based on this condition, a simple choice of the transformation is determined which allows an analytically tractable solution of the original non-convex problem to be easily obtained once the transformed convex problem is solved. We further study the structure of the optimal transmission policy in a special case and find it to follow a weighted-directional-water-filling structure. In particular, the optimal policy tends to allocate more power in earlier time slots and less power in later time slots. Our analytical insight is verified by simulation results.