I'm no real RF-guy, just circulated ruffian-style around
them, but I think a regalr AM-FM receiver is limited
by sillycone and mother nature, temperature to a sensitivity
of around 2uV, 2 millionth of a volt (50-100ohm)
That is, staying below 1W transmit power the receiver
should cope with some 100-120dB dynamics, more than
a real HiHi 96dB golden ear or foot. (Molly Ivans, Bush
was born with a golden foot in his mouth)
Understanding the difference between 30dB (peanuts),
60dB (serious) and 90-100-120dB demands a lot, many
years of frustration and experience measuring things
which cannot be measured.
If one talks 90-100dB out-of-band transmission
even my 48,000 tap filter is ridiculous, also needs
more acuracy than any regular DSP, and RF prts
couldn't do it anyway.
That is why FCC is so important, although evil, socialist
and ridiculous, anti-libertarian for the free farters...
(normal basestation 40-100W total power, like regular
light bulb, AM stations for propaganda 10-200,000W,
heats 10 finnish saunas, 100 american, micro owens
around 400-600W, a cup of hot water in one minute)
That is, the point with the CDMA cocktail parties is
to have small, sensitivity inefficient cells, low dynamics,
especially because of need for tight, limiting
power control.
But, where the population densities are high, there must
be a small cells anyway..
however, in rural, or low density handset areas it is pretty
bad...
Unluckily for the great idea of CDMA and frequency reuse,
synchronous or not, GSM-OFDMA is better in covering
both cases.
(one reason why China is struggling with ping-pong CDMA)
Ilmarinen
Obviously any industrialized nation has FCC-like
regulation, few are as handicapped and messed up as
the US FCC.
To go really deep it has to do with who has the rightful
ownership, true property rights of all of US, the
first citizens or those who arrived later... issues
like common rights to water, air, ether, right to
trespass (extremely old scandinavian law, every man's right)
compared to "disaster of the common", failed land
reforms, public schools, 2-party systems,etc,etc..
(Haley Barbour is one of my favorites, not to forget
Ayn Rand)
As well as water rights, the reason Norway stays out of EU
until UK behaves. |
