GSM原理介紹(英文)(ppt 34頁)
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GSM原理介紹(英文)(ppt 34頁)內容簡介
. GSM900/DCS1800
. The GSM Network & Air Interface
. Technical Basics
. Speech Coding
. Types of Channel
. Making a Phone Call
GSM Development History
1982 Groupe Special Mobile?is created within CEPT
1986 A Permanent Nucleus is set up
1987 Main radio transmission techniques are chosen, based on prototype evalution (1986)
1989 GSM becomes an ETSI technical committe
1990 The phase 1 GSM 900 specifications are finalized
1991 First systems are running
1992 All major European GSM 900 operators begin commercial operator
……
..............................
. The GSM Network & Air Interface
. Technical Basics
. Speech Coding
. Types of Channel
. Making a Phone Call
GSM Development History
1982 Groupe Special Mobile?is created within CEPT
1986 A Permanent Nucleus is set up
1987 Main radio transmission techniques are chosen, based on prototype evalution (1986)
1989 GSM becomes an ETSI technical committe
1990 The phase 1 GSM 900 specifications are finalized
1991 First systems are running
1992 All major European GSM 900 operators begin commercial operator
……
..............................
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