抑制宏基站干扰的下行干扰协调方案  

A Downlink Interference Coordination Algorithm to Suppress Interferences from Macro Base Station

作　　者：李远[1] 彭木根[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学),北京100876

出　　处：《北京邮电大学学报》2012年第6期74-77,82,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61222103);北京市自然科学基金项目(4110001);国家科技重大专项项目(2011ZX03003-002-01)

摘　　要：在宏蜂窝和微微蜂窝联合覆盖的异构无线网络中,具有大发射功率的宏基站会给微微蜂窝用户造成较大的下行干扰,为此,提出一种波束零陷-用户选择算法,以抑制来自宏基站的下行干扰,从而达到改善系统频谱效率的目的.对微微蜂窝用户受到的干扰进行了数学建模和理论分析,并通过仿真评估了所提算法带来的性能增益,结果表明,新算法在高信噪比或微微蜂窝小区数目较大时的性能增益非常显著.In heterogeneous networks where the Macro cell is overlaid by Pico cells,severe downlink interference is suffered by Pico users from the Macro base station of high transmission power. A beam nulling-user selection algorithm is proposed to suppress the interference from the Macro station and therefore enhance the system spectrum efficiency. The interference to Pico users is modeled and analyzed in a mathematical way. Simulation is performed to evaluate the enhancement of the proposed algorithm. It is shown that the performance is significantly improved in case of the high signal-to-noise ratio region or large number of Pico cells.

关 键 词：异构无线网络 协作多点技术 波束零陷 用户选择 

分 类 号：TN929.53[电子电信—通信与信息系统]