17 Dec
2003
17 Dec
'03
11:17 p.m.
Well, given that I work in CDMA, and given that CDMA provides some inherent positioning capabilities, the possibility of defeating positioning by hacking the phone software to "dither" the return link signal timing has occurred to me. It wouldn't let you appear to be in a different cell than the one you're in, but it would certainly decrease the measurement precision. You could disable the dither if you want when you make an E911 call. What sweet revenge that would be against the government that inflicted Selective Availability on all us civilian GPS users. :-) Phil