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Practical RF Architectures for
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Practical RF Architectures for GSM and WCDMA Mobile Terminals
Mobile Generations
• 1st generation systems, analog
• NMT, AMPS, TACS
• 2nd generation systems, digital
• GSM, IS-136 TDMA, IS-95 CDMA, PDC
• 3rd generation systems, digital wide band
• WCDMA standards have been prepared by ETSI (Europe), ARIB (Japan),
TIA (USA),...
• 3GPP1 is a joint project that combines all proposals into one standard
• Harmonized standard includes three modes
• Direct sequence mode based on 3GPP (UTRA2/FDD)
• Multi carrier mode based on CDMA2000 (USA proposal)
• TDD mode based on 3GPP (UTRA/TDD)
1) 3GPP = 3rd Generation Partnership Project
2) UTRA = Universal Terrestrial Radio Access
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