TD-LTE覆盖性能分析

1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 2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 ······································································· 10 2.2.2.2.2 用于大延时 CDD 的预编码 ························································ 10 2.2.2.2.3 预编码码书 ················································································ 11 2.2.2.3 波束赋形技术 ··················································································· 14 2.3 TD-LTE 时隙结构及资源分配方式 . 14 2.3.1 TD-LTE 帧结构及 CP 设置 ······························································· 14 2.3.2 TD-LTE 资源块 ················································································ 16 2.3.3 CP 及 GP 设置对覆盖的影响 ··························································· 19 2.4 TD-LTE 物理层信道 . 21 2.4.1 信道分类及功能 ··············································································· 21 2.4.2 各物理信道主要流程及作用 ····························································· 23 2.4.2.1 物理下行共享信道 ············································································ 23 2.4.2.2 物理上行共享信道 ············································································ 24 2.4.2.3 物理下行控制信道 ············································································ 24 2.4.2.4 物理上行控制信道 ············································································ 24 2.4.3 各物理信道时频资源分配 ································································· 25 32.5 TD-LTE 覆盖特性小结 . 26 3 TD-LTE 覆盖规划基本流程 ····································································· 28 4 TD-LTE 链路预算 ··················································································· 30 4.1 链路预算关键参数取值分析 . 30 4.1.1 基本配置参数 ··················································································· 30 4.1.2 收发信机参数 ··················································································· 31 4.1.3 附加损耗 ·························································································· 32 4.1.4 传播模型选取 ··················································································· 33 4.2 TD-LTE 各类信道 SNR 需求 . 33 4.2.1 控制信道 SNR 需求 ········································································· 33 4.2.2 业务信道 SNR 需求 ········································································· 33 4.3 链路预算结果 . 35 4.3.1 基于双通道产品的链路预算结果（每 RRU 20W，新增 18dBi 天线） 35 4.3.2 基于 8 通道产品的链路预算结果（每 RRU 5W，共用 TD-SCDMA 天线）37 4.3.3 和 TD-SCDMA 链路预算对比 ··························································· 39 5 总结 ········································································································ 39 5.1 覆盖性能总结 . 39 5.2 覆盖规划建议 . 40 5.3 后续工作 . 40 1TD-LTE覆盖性能分析 【摘 要】 ： 本课题主要对TD-LTE覆盖性能进行了研究，课题首先对TD-LTE多址接入技术、多天线技术、时隙结构及资源分配、物理层信道等关键技术进行论述，并说明了这些关键技术对覆盖性能的影响，总结TD