GSM????綽????????
???????????? ???????[ 2012/12/12 10:48:12 ] ????????
1??4??????????????
????(1)????
????????GSM????????????????????????????? ??????????????????????л??????????????? ?????????????????????????????л??????? ?????????????????????????????????????????????????漲???????
???????????????????GSM??????????????????????? ?????(??????????????)??????????
?????????????л???????????????????????????????????????????????????????(??????????????)??????????
????(2)???????
?????GSM900MHz???
????????????(MOD pectsrum)
??????????????????????????????ETSI?漲??Time-Plate???·?(????????????μ?ETSIll??10?е?漲)??
?????????????????????(33dB m)??
?????????????м???????в????
??????????????? ?????????????????(margin)??????????????Time-Plate???????????Time-Pkate??????????????????????????????????????????С??
????????????????·?????
??margin??l0dBm??????????????
??0??margin??l0dBm???????????????
??margin??0???????????Time-Plate????????????????
????????(switch spectum)
??????????????????????????????ETSI?漲??Time-Plate???·???
?????????????????豸??5(33dBm)??
???????????????С?????????????в??? ??CH1?? CH62?? CHl24)??
????????????????·?????
??margin??10dBm?????????????
??0??margin??l0dBm??????????????
??margin??0???????????Time-Plate??????????????????
?????DCSl800MHz???
????????(MOD spectrum)
???????????0(30dBm) ??
???????GSM900MHz??
1.5 ???????
????(1)????
???????????????????????????????????????????????????л????????????????????????????????(????????)??
????????????????????????????????????????????????????????????????????????????????(??????)??????κ???????????????????????????????(?????)????豸???????????κ????????
?????????????Tx?????????????????????
????(2) ???????
????????????????RB??l0KHz???????RB??3MHz
???????VB??l0KHz ???????VB23MHz
(????????????????????????????????λ???й??)
????????????????ε????????????
?????????????????????????????????????????9KHz-1GHz?????????書?????С??250nw(??-36dBm)????1GHz?1275GHz?????????????????書?????С??1uw(????-30dBm)??
?????????????????????????9kHz-1GHz?????????????????????С??2nW(-57dBm)??
1GHz-12.75GHz?????????????????????С??20nW(??-47dBm)??
??????????????????μ?????????M S???????GSM935MHz?960MHz??DCSl805?1880MHz?????????????????????
-25PW(??-76dBm)????l??????????
-45PW(??-84dMm)????2??3??3??5??????????
1.6 ????
????????????????????????????????????????????????(??lOλ)???????????????????????????書????????????????б?????????????????????????????????????????????????????????????? ?????????????????????????????????????2 ?????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11