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fa zhan xun su de dcs 1800
Author(s): 
Pages: 51
Year: Issue:  11
Journal: Electronic Products China

Keyword:  DCS1800双频手机双频网数字蜂窝系统工作频段信道复用GSM/DCS电信标准双工方式运营公司;
Abstract: <正> DCS(数字蜂窝系统)1800是在ETSI(欧洲电信标准化学会)制定的GSM的基础上发展而来的,1991年由ETSI定义。GSM采用TDMA/FDD双工方式,频率间隔为200KHz,信道复用数为8。DCS1800与GSM的不同主要在于工作频段,DCS 1800为1800MHz,而GSM为900MHz。
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