LTE硬件RF测试介绍.ppt

日期: 2015-10-9 LTE 产品硬件射频介绍 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 硬件测试模块 ( Radio Frequency ) ( Base Band ) 安规 SAR 测试 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. LTE 简介 LTE ( Long Term Evolution ,长期演进) 是由 3GPP ( The 3rd Generation Partnership Project ,第三代合作伙伴计划)组织制定的 UMTS ( Universal Mobile munications System ,通用移动通信系统)技术标准的长期演进,于 2004 年 12 月 3GPP 多伦多 TSG RAN#26 会议上正式立项并启动。 LTE 系统引入了 OFDM ( Orthogonal Frequency Division Multiplexing ,正交频分复用技术)和多天线 MIMO ( Multi-input Multi-output ,多输入多输出)等关键传输技术,显著增加了频谱效率和数据传输速率(峰值速率能够达到上行 50Mbit/s, 下行 150Mbit/s ),并支持多种带宽分配: ,3MHz,5MHz,10MHz,15MHz 和 20MHz 等,频谱分配更加灵活, 系统容量和覆盖显著提升。 LTE 无线网络架构更加扁平化,减小了系统时延,降低了建网成本和维护成本。 LTE 系统支持与其他 3GPP 系统互操作。 LTE 系统支持两种制式: FDD-LTE 和 TDD-LTE ,即频分双工( Frequency Division Duplexing , FDD ) LTE 系统和时分双工( Time Division Duplexing , TDD ) LTE 系统,二者技术的主要区别在于空口的物理层。 FDD-LTE 系统上下行传输采用成对的频段接收和发送数据,而 TDD-LTE 系统上下行使用相同的频段在不同的时隙上传输,相对于 FDD 双工方式, TDD 有着较高的频谱利用率。 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile 5