IMT-2000无线接口技术规范建议 IMT-2000 Terrestrial Radio Interfaces S WCDMA TD-SCDMA CDMA 2000. IS-136.DECT IMT-DS IMT-TD IMT-MC IMT-SC IMT-FT CDMA DS CDMA TDD CDMA MC TDMA SC FDMA/TDMA UMTS FDD UMTS TDDIMT-2000无线接口技术规范建议 IS-136 DECT IMT-DS CDMA DS TD-SCDMA CDMA 2000 IMT-TD CDMA TDD IMT-MC CDMA MC UMTS FDD UMTS TDD IMT-SC TDMA SC IMT-FT FDMA/TDMA IMT – 2000 Terrestrial Radio Interfaces WCDMA