摘要
在多用户OFDMA资源分配中提出一种基于子载波权衡的资源分配算法.资源分配过程中,在对公平性最差的用户进行子载波分配时,进行子载波权衡.根据权衡后子载波信道增益的变化情况,进行子载波分配.通过子载波权衡,将待分配的子载波分配给权衡用户;同时对于公平性最差的用户,从已分配给权衡用户的子载波中获得一个权衡子载波;使得权衡后分配的子载波较权衡之前获得更高的信道增益.仿真结果表明,算法在保证用户公平性的同时,提升了系统的频谱利用率.
A resource allocation algorithm of multi-user OFDMA based on subcarrier tradeoff was proposed. In allocating the subcarrier to the worst fairness user, the system executed the subcarrier tradeoff. The system allocated the subcarrier according to channel gain changes. Through subcarrier tradeoff, the system allocated subcarriers to the tradeoff user. Simultaneously, the worst fairness user got a tradeoff subcarrier from the subcarriers allocated to the tradeoff user. So the subcarrier could get a higher channel gain. Simulation results show that the algorithm improves the spectral efficiency of the system and ensures user fairness.
出处
《中国计量学院学报》
2015年第1期110-114,共5页
Journal of China Jiliang University
基金
国家自然科学基金资助项目(No.61379027)
浙江省自然科学基金资助项目(No.LY14F010019)
江苏省博士后基金资助项目(No.1302059B)
