Spreading and modulation (TDD) TS 25.214 Physical layer procedures (FDD) TS 25.224 Physical layer procedures (TDD) TS 25.215 Physical layer Measurements (FDD) TS 25.225 Physical layer Measurements (TDD) External links 3gpp.org 3rd Generation Partnership Project Standard 3GPP Specifications Numbering Schemes Vocabulary for 3GPP Specifications, up to Release 8 UMTS LTE Link Budget Comparison UMTS FAQ on UMTS World Worldwide W-CDMA frequency allocations on UMTS World UMTS TDD Alliance The Global UMTS TDD Alliance 3GSM World Congress UMTS Provider Chart LTE Encyclopedia TD-SCDMA Forum TD-SCDMA Industry Alliance UMTS FAQ Telecommunications-related introductions in 2002 3GPP standards Bandplans Metropolitan area networks Mobile telecommunications Mobile telecommunications standards Network access UMTS Videotelephony Wireless networking