TD-SCDMA的原理及发展:Early period: from early 50’s:
Military application
Without system concept
Analog voice and signaling
Single BS operation
Concept of cellular in 70’s
Cellular concept
Frequency Reuse
The 1 G: Analog system in 80’s
Different standard in each country
The 2G: Digital system in 90’s
GSM/CDMA(IS-95)
Universal standard
Duplex is 1G/2G: FDD
声明:本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人,不代表电子发烧友网立场。文章及其配图仅供工程师学习之用,如有内容侵权或者其他违规问题,请联系本站处理。 举报投诉
全部0条评论
快来发表一下你的评论吧 !