Transmit Power Optimization for Relay-Aided Multi-Carrier D2D Communication

• 来源期刊: 清华大学学报自然科学版（英文版）
• 年，卷（期）: 2018,（1）
• 页码范围: 65-74
• 页数: 10页
• 语种: 英文
• DOI: 10.26599/TST.2018.9010055

摘要

In this paper,we consider the power optimization problem in Orthogonal Frequency Division Multiplexing (OFDM)-based relay-enhanced device-to-device (D2D) communication.In a single cell transmission scenario,dualhop communication is assumed in which each D2D user re-uses the spectrum of just one Cellular User (CU).In this work,we formulate a joint optimization scheme under a Decode-and-Forward (DF) relaying protocol to maximize the sum throughput of D2D and cellular networks via power allocation over different sub-carriers.The problem is thus transformed into a standard convex optimization,subject to individual power constraints at different transmitting nodes.We exploit the duality theory to decompose the problem into several sub-problems and use Karush-Kuhn-Tucker (KKT) conditions to solve each sub-problem.We provide simulation results to validate the performance of our proposed scheme.