Energy-aware Resource Allocation in Multi-user OFDM Systems

Download or read book Energy-aware Resource Allocation in Multi-user OFDM Systems written by Suman Khakurel and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Moreover, we propose a fast algorithm with linear complexity for computing the optimal WF level and perform simulations to illustrate the effectiveness of the proposed algorithm. Next, we investigate the trade-off between spectral efficiency (SE) and EE, which are the two important design criteria of future wireless systems. We introduce an optimization problem to maximize the SE of a multi-user OFDM system with a constraint on its minimum EE. Exploiting this formulation, we analyze the trade-off between SE and EE as a function of various parameters, such as circuit power, power amplifier (PA) efficiency, number of users, number of subcarriers and channel power gain. Attention is then paid to energy-aware resource allocation in a quality-of-service (QoS)-constrained DL mixed-traffic multi-user OFDM system.