@article{Waqas2018, 
author = {Muhammad Waqas and Guftaar Ahmad Sardar Sidhu and Tayyaba Jabeen and Muhammad Afaq Ahmad and Muhammad Awais Javed},
title = {Transmit Power Optimization for Relay-Aided Multi-Carrier D2D Communication},
year = {2018},
journal = {Tsinghua Science and Technology},
volume = {23},
number = {1},
pages = {65-74},
keywords = {device-to-device communication, Orthogonal Frequency Division Multiplexing (OFDM), Decode-and-Forward (DF) relay transmission, power optimization},
url = {https://www.sciopen.com/article/10.26599/TST.2018.9010055},
doi = {10.26599/TST.2018.9010055},
abstract = {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, dual-hop 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.}
}