TD-SCDMA的原理及发展:Early period: from early 50’s:Military applicationWithout system conceptAnalog voice and signaling Single BS operationConcept of cellular in 70’sCellular concept Frequency ReuseThe 1 G: Analog system in 80’sDifferent standard in each country The 2G: Digital system in 90’sGSM/CDMA(IS-95)Universal standardDuplex is 1G/2G: FDD
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