TD-LTE覆盖性能分析.pdf

科研专业项目成果报告 TD-LTE 覆盖性能分析 院审核人：张玉胜 项目主管： 汤利民 所审核人：胡恒杰 项目负责人：赵旭凇 编写人：赵旭凇、张炎炎 项目编号：09WX13 项目类别：B 中国移动通信集团设计院有限公司 二○○九 年 十一月 1 目 录 1 概述·········································································································· 1 2 TD-LTE 关键技术及对覆盖性能的影响····················································· 2 2.1 TD-LTE 多址接入技术 2 2.1.1 下行多址方式 OFDMA······································································· 2 2.1.1.1 OFDMA 系统的优势··········································································· 3 2.1.1.2 OFDMA 系统的局限··········································································· 4 2.1.2 SC-FDMA·························································································· 4 2.2 TD-LTE 多天线技术 5 2.2.1 TD-LTE 多天线分层映射规范····························································· 6 2.2.1.1 单天线的层映射 ················································································· 6 2.2.1.2 空间复用的层映射·············································································· 6 2.2.1.3 传输分集的层映射·············································································· 7 2.2.2 TD-LTE 多天线预编码技术 ································································ 8 2.2.2.1 传输分集 ···························································································· 8 2.2.2.2 空间复用传输····················································································· 9 2.2.2.2.1 无 CDD 的预编码····························································