一种LTE A系统下COMP下行用户调度算法

摘要

在LTE A系统中,应用多种协调技术来减少小区间干扰,但对边缘用户性能提升有限.为此,需要应用关键技术COMP来解决边缘用户性能受限的问题.COMP下行用户调度算法已经成为当前的研究热点.基于系统研究,提出了一种改进的LTE A系统下协作多点传输(COMP)的下行用户调度算法,亦即基于干扰最小的调度算法,根据剩余用户的调度因子来选择用户,确保被调度的用户之间干扰较小并且自身信道增益较高,能获得较大的吞吐量.该算法不仅将用户之间的相关性最小和吞吐量最大的特点相结合,而且避免了大量的计算.仿真结果表明,所提出的算法与PF调度算法相比较在吞吐量和相关性上得到了进一步的优化,系统性能更加优越.%In LTE A system,a variety of techniques are used to reduce the coordination of inter-cell interference,but it' s limited in im-provement of the edge of users' performance. Therefore,it needs key technologies COMP to solve the problem mentioned above. COMP downlink user scheduling has become one of research hot spot. Based on systematic study,an improved scheduling algorithm of downlink users has been proposed under Coordinated Multi-Point ( COMP) in the LTE A system,which means that based on minimum interfer-ence scheduling algorithm,the users have been chosen in accordance with remaining user scheduling factor to ensure that interference be-tween scheduled users is small and the self-channel gain is high,getting a larger throughput. This algorithm not only combines the user correlation minimum with maximum throughput,but also avoids a lot of calculations. The simulation results show that the correlation and the throughput of algorithm have been further optimized and that the performance of the system is more superior.