OFDMA系统跨层资源分配算法

OFDM具有高频谱利用率和抗多径衰落的优点,已被公认为第三代移动通信系统长期演进标准以及第四代移动通信系统的核心技术。OFDMA是基于OFDM的一种多用户接入技术,在OFDMA系统中,各用户在不同的子载波上同时传输数据。主要研究了OFDMA系统中的跨层资源分配算法。详细分析了保证速率比例公平的非实时业务跨层资源分配算法,仿真结果说明该算法能够较好地保证用户之间的公平性,并能够获得较大的系统吞吐量和较小的业务延时。

Cross-layer Resource Allocation Algorithm for OFDMA System

OFDM,for its high spectral efficiency and ability in mitigating the effects of multi-path channel propagation,is reguarded as the core technology in LTE and 4G.OFDM-based OFDMA is a promising access method,in which multiple users are allowed to transmit signals simultaneously on different sub-carriers.The cross-layer resource allocation algorithm for OFDMA systems is studied,and the cross-layer resource allocation algorithm with rate proportional fairness is analyzed.Simulation results show that this algorithm could achieve fairly high system throughout and relatively low service delay,while ensuring the fairness between among the users.