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CDMA | |
BTS, | 869, 040...893, 970 |
MS, | 824, 040...848, 970 |
BTS | 5 x10-8 |
MS | 2,5 x 10-6 |
QPSK | |
, : 3 40 | 1,25 1,5 |
, | 1,2288 |
, : BTS MS | 32768 242-1 |
BTS | 1 -; 1 ; 7 ; 55 |
MS | 1 ; 1 |
BTS, | 50 |
, : | 1200 9600, 4800 9600, 4800, 2400, 1200 |
BTS | r = 1/2 |
( , ) | = 9 |
MS | r = 1/3; = 9; 64- |
(b/No) , | 6...7 |
MS, : 1- 2- 3- | 6,3 2,5 1,0 |
MS, | 0,5 |
http://cdma.ucoz.ru/forum/49-63-1
CDMA - - () .
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: http://www.mirant.kiev.ua/publ/telekommunikacii_tekhnologii/tekhnologii_i_novinki/principy_postroenija_setej_cdma/14-1-0-168#ixzz4RxGdqw8p
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CDMA | |
BTS, | 869, 040...893, 970 |
MS, | 824, 040...848, 970 |
BTS | 5 x10-8 |
MS | 2,5 x 10-6 |
QPSK | |
, : 3 40 | 1,25 1,5 |
, | 1,2288 |
, : BTS MS | 32768 242-1 |
BTS | 1 -; 1 ; 7 ; 55 |
MS | 1 ; 1 |
BTS, | 50 |
, : | 1200 9600, 4800 9600, 4800, 2400, 1200 |
BTS | r = 1/2 |
( , ) | = 9 |
MS | r = 1/3; = 9; 64- |
(b/No) , | 6...7 |
MS, : 1- 2- 3- | 6,3 2,5 1,0 |
MS, | 0,5 |
. 2.
CDMA TDMA | |||||
, | IS-136, / | GSM, / | CDMA, | CDMA, | CDMA, |
, , / | 0,03 8 | 0,2 13 | 1,23 8 | 1,23 13 | 1,23 8 |
1/3 | 1/3 | 1/3 | |||
3 | |||||
( 1 ) | 14,3 | 56,1 | 29,6 | 86,2 |