摘要
为了消除共信道干扰(CCI),研究了LTE-A系统基于码本的预编码算法,与用户调度算法相结合,提出了一种基于效用函数的调度算法。该算法计算系统内所有用户的时延和速率效用函数,并判定用户的优先级,长时延或低速率的用户将被优先调度。仿真结果表明,基于效用函数的调度算法,在保证用户吞吐率的前提下,与最大吞吐率调度算法相比,兼顾了时间公平性;与比例公平调度算法相比,有更小的时间和空间复杂度,更适用于小区用户拥挤的场景。
LTE-A codebook-based precoding algorithms are studied to eliminate Co-Channel Interference（ CCI）. Combining with user scheduling algorithms,a novel scheduling algorithm based on utility function is proposesed. This algorithm calculates all users＇ delay and data rate utility functions in the system,and then determines users＇ priorities,i. e. users with long delay or low data rate will be scheduled firstly. Simulation results show that,compared with Max Throughput algorithms,the proposed scheduling algorithm can guarantee throughput of users and take the time fairness into account. Moreover,compared with Proportional Fairness scheduling algorithms,the proposed algorithm has smaller time and space complexities,and it is more applicable in the scene which has many cell users.
出处
《科学技术与工程》
北大核心
2015年第6期215-219,共5页
Science Technology and Engineering
基金
国家自然科学基金(61201265
61221004和61376027)
广西无线宽带通信与信号处理重点实验室2011年度主任基金项目(21108)资助
