面向能耗效率优化的CoMP系统频谱效率性能分析

Performance Analysis of Spectrum Efficiency of Co MP Systems with Energy Efficiency Optimization

CoMP技术可以有效的降低无线通信系统能耗,提高系统能耗效率。针对现有利用Co MP技术提升能耗效率的研究中忽视频谱效率的问题,对提升能耗效率过程中的频谱效率变化趋势进行了分析及仿真验证,并对该场景下能耗效率与频谱效率变化趋势的关系进行了分析。仿真验证表明,通过CICA方式提高系统能耗效率是以牺牲系统的频谱效率为代价的,但当Co MP的区域占所有区域的比例为35%或参与Co MP的基站数量设置为4时,单位频谱效率对提高能耗效率的贡献接近极限。

Applying CoMP with guaranteed coverage can improve the energy efficiency of wireless communication systems. Based on the fact that the former research only focused on the energy efficiency aspect and ignored the impact of energy efficiency to spectrum efficiency, the impact to spectrum efficiency with CICA was analyzed. The mathematic model of spectrum efficiency with CICA was introduced, and the variant trend of spectrum efficiency with CICA used was analyzed and simulated. The result of simulations shows that the energy efficiency improvement is accompanied by the decrescence of spectrum efficiency. Simulations also show that when the ratio of CoMP area is about 35% or set the number of base stations participated in CoMP to 4 would achieve the best performance trade-off between energy efficiency and spectrum efficiency.