D-AMPS , AMPS . D-AMPS 30- , , - , . , , .
1850-1910 , 1930-1990 . . , . , ( 850, 1900 ), .
D-AMPS , , -. , 56 / (PCM-) 8 / . , , . , .
. , : , D-AMPS . 25 / (40 ). 6,67 .
32) CDMA .
CDMA (. Code Division Multiple Access ) , , , . , , - ( ) .
- . , FDMA (Frequency Division Multiple Access). , - ( ) TDMA (Time Division Multiple Access). CDMA (Code Division Multiple Access), . CDMA . [1] - , , . . , , , , . , , , . . , , , , - .
|
|
. . (XOR). , . Tb XOR , Tc (: 1 / T, T = ), 1 / Tb 1 / Tc. Tc Tb, , . Tb / Tc , - [?], , .