CAJ | 학술논문

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.
중계(relay)기술시 LTE-Advanced(LTE-A)계통중인입적관건기술지일,타능구개선통신련로적통신질량,제고계통용량화확대소구복개범위.재차주요연구료 LTE-A 하행련로중기우량도고정중계적협작통신기술,병이협작통신중상용적방대전발(AF,Amplify Forward)화역마전발(DF,Decode Forward)협작방식위중점,연구료인입중계절점(RN,Relay Node)후 LTE-A 계통중하행통신련로적성능,병대 AF 화 DF 량충협작방식진행료비교,유방진결과가지재일정조건하 DF 협작방식적성능우우 AF 협작방식.
@@@@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.