摘要: |
在大规模分布式天线系统中,静态分簇和用户调度带来的簇间干扰问题会导致系统和速率下降。针对这个问题,提出了一种两阶段贪婪用户调度算法。首先,每个簇内并行实施贪婪用户调度;然后,从全局上再次利用贪婪算法来剔除簇间干扰较大、服务质量较差的用户,使得系统和速率进一步提升。仿真结果表明,随着不同系统参数的改变,两阶段贪婪用户调度算法可有效提高系统和速率。 |
关键词: 大规模分布式天线系统 静态分簇 用户调度 贪婪算法 |
DOI: |
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基金项目:国家自然科学基金资助项目(61401240,61501264);江苏政府留学奖学金项目(JS-2014-206);东南大学移动通信国家重点实验室开放研究基金项目(2015D02);南通大学博士科研启动基金项目(14B08) |
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User scheduling algorithms for large-scale distributed antenna system based on static clustering |
GAO Xiang,SUN Qiang,XU Chen,WANG Jue |
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Abstract: |
In a large-scale distributed antenna system,static clustering and user scheduling will redeuce the system sum-rate due to inter-cluster. To solve this problem,a two-stage greedy user scheduling algorithm is proposed. First,each cluster uses greedy user scheduling parallelly. Then,from the overall situation,the greedy algorithm is utilized to remove some users with larger inter-cluster interferences and poor quality of service,thus further improving the system sum-rate. Simulation results show that with different system parameters,the two-stage greedy user scheduling algorithm can effectively improve the system sum-rate. |
Key words: large-scale distributed antenna system static clustering user scheduling greedy algorithm |