团 常用缩略语(4/6) FDMA:Frequency Division Multiple Access频分多址 n TDMA:Time Division Multiple Access时分多址 CDMA:Code Division Multiple Access码分多址 四SDMA:Space Division Multiple Access空分多址 四FDD:Frequency Division Duplex频分双工 TDD:Time Division Duplex时分双工 IMT:International Mobile Telecommunication 国际移 动通信 四MT-DS:Direct Spread对应WCDMA(宽带CDMA)常用缩略语 (4/6) FDMA: Frequency Division Multiple Access 频分多址 TDMA: Time Division Multiple Access 时分多址 CDMA: Code Division Multiple Access 码分多址 SDMA: Space Division Multiple Access 空分多址 FDD: Frequency Division Duplex 频分双工 TDD: Time Division Duplex 时分双工 IMT: International Mobile Telecommunication 国际移 动通信 IMT-DS: Direct Spread 对应WCDMA(宽带CDMA)