No, I didn't, because the context was a list of two
things, I took the first one to start with.
Technology might change, but Shannon limit on
capacity doesn't, nor does mother nature.
The Q-Gillhousen problem is that Shannon assumed
things like instant, telepathic power control, as
well as perfect heavenly synchronization, perfect
cancellation of whatever needs to be cancelled.
(Even Wozencraft had one simple example to show
the student the limits of that)
Not to forgot the old neanderthalian problem of catching
and tracking a moving target, which Shannon was smart
enough to understand while juggling balls.
So, what does 1MHz and 5MHz have to do with office
enviroment, multipath fading and cutting corners??
(the Gillhousen statitistics on the distribution of
multipath delays and amplitudes is a popular thing,
always was)
AMPS grids of base stations, dropping calls, TDMA which
must be secretely AMPS, no clue to the user, and CDMA which
must secretely be TDMA, no clue to the user??
40% users on AMPS??
Even in Russia one knows if to blame NMT or GSM when the
call is dropped.
But most operators actually see what goes on, assuming
they have a monitoring system which hasn't been tampered with. (some have)
Ilmarinen
Btw, what is the constantly changing technology, the
Japanese making the processing equipment for better, smaller sillycone processes, sorting out the
light and the molecules, achieving the quality needed
for business??
Or is it the GSM-OFDMA thing?? |
