两跳中继协作通信技术的研究与仿真
杜伟华;刘紫燕
【期刊名称】《通信技术》 【年(卷),期】2013(000)002
【摘要】Relay, as one of the key technologies introduced in LTE-Advanced system, could improve the quality of communication link, raise the system capacity and expand the cell coverage. The cooperative communication technology based on fixed two-hop relay in LTE-A donw link is studied, and with AF and DF relay cooperative modes as the key points, the downlink-level performance of LTE-A system is discussed, the comparison of AF and DF relay cooperative technologies also done. Simulation indicates that the DF mode is superior to AF mode in performance.% 中继(relay)技术是 LTE-Advanced(LTE-A)系统中引入的关键技术之一,它能够改善通信链路的通信质量,提高系统容量和扩大小区覆盖范围。在此主要研究了 LTE-A 下行链路中基于两跳固定中继的协作通信技术,并以协作通信中常用的放大转发(AF,Amplify Forward)和译码转发(DF,Decode Forward)协作方式为重点,研究了引入中继节点(RN,Relay Node)后 LTE-A 系统中下行通信链路的性能,并对 AF 和 DF 两种协作方式进行了比较,由仿真结果可知在一定条件下 DF 协作方式的性能优于 AF 协作方式。 【总页数】3页(70-72)
【关键词】中继;协作通信;放大转发;译码转发 【作者】杜伟华;刘紫燕
两跳中继协作通信技术的研究与仿真
