5 Feb
1993
5 Feb
'93
10:48 a.m.
Speculation: The "A5 `scrambling code'" is used as the spreading code for a spread spectrum radio.
It would seem that both the sender and reciever need to be exactly syncronized to within 1/4 of a bit for this to work. Since voice data requires about 64Khz, if you spread this by a factor of 32 (for a scrambling frequency of 2.048Mhz) this would mean the sender and reciever would need to be synced to well within 500ns of each other. Isn't this a bit difficult? How do they do it? brad