基站测试规范要求及测试原理概览.ppt

cdma2000 Evolution IS-95A IS-95A/B ：2G移动通信标准也称为 cdmaOne. IS-2000 IMT-2000的一种3G通信标准 也被称为cdma2000 1xEV-DO Release 0 1xEV-DO 被规划用于优化数据传输，最高可支持2.4Mbps 的传输速率，支持多媒体业务如MP3，video等传输 1xEV-DO Release A 1xEV-DO Release 0的升级, CDMA2000 1xEV-DO Rev A 可提供更高数率的上下行连接，前向最高可达到 3.1 Mbps, 反向最高 1.8 Mbps. Rev A 在载波带宽不变的情况下（1.25 MHz）也提供了更高的小区容量。 Spreading Rate 1 and Spreading Rate 3 CDMA Channel Generation CDMA Carrier (Cellular Band) CDMA Carrier (Cellular Band) CDMA Carrier (PCS Band) CDMA Carrier (PCS Band) Radio Configurations Radio Configuration: A set of Forward Traffic Channel and Reverse Traffic Channel transmission formats that are characterized by Physical Layer parameters such as transmission rates,modulation characteristics,and spreading rate cdma2000 Radio Configurations: RC1 through RC9 on the Forward link RC1 through RC6 on the Reverse link Forward Link Radio Configurations Reverse Link Radio Configurations 快速前向链路功率控制 前向链路的发送分集 Forward Link Channel Function Forward Link Channel Function Forward Link Channel Function Reverse Link Channel Function Reverse Link Channel Function Cdma基站测试项目 频率覆盖 频率稳定度 相位精度 波形质量 子信道前向功率控制 平均功率测量 导频功率测量 码域功率测量 带外杂散 发射互调 占用带宽 Cdma测试注意事项 确保输入正确的频点，Input=RF，注意仪表的最大输入电平，安全操作 Forward(RC1-2)：IS95基站；Forward(RC3-5)：2000基站 确保输入正确的频点 Forward Link Physical Channel TDM of Forward Link Channel Reverse Link Physical Channel Reverse Link Frame Structure cdma20001x EV DO Rev 0 Optimized support for downlink intensive (asymmetric), delay-tolerant applications Web browsing, File Transfer, WAP etc Goals Capacity and Coverage Enhancement Support for QoS Capacity Enhancement Forward Link 2.4Mbps peak data rate Physical Layer H-ARQ Multi-user diversity scheduler Diversity reception Reverse Link 153.6Kbps peak data rate Reverse rate is controlled by several factors cdma20001x EV DO Rev A Physical Layer Improved support for QoS-sensitive services Rapid connection setup with improved terminal battery life Higher rate access channel (up to 38.