Electronic Noise Is Drowning Out the Internet of Things
[ snip ]
"Radio-frequency noise pollution is everywhere. You can’t see, hear,
taste, or smell this noise, of course. Nor can you summon it and study
it at your leisure, because it comes and goes along with the movements
of its sources or its victims. Start with the fact that any significant
digital appliance has a high-speed clock and a digital bus, and both
leak radiation profusely. Electric motors and generators generate RF
noise with every small spark that jumps between their brushes and
spinning commutators. Automobile engines sputter when spark plugs fire.
Computers snap and pop during the sharp transitions between ones and
zeroes. The high-voltage ballasts of neon signs and fluorescent lights
blare a broad mix of frequencies. Industrial machinery, elevators,
welders, relays, switching power supplies, even light dimmer switches
add to the din. (Of course, natural sources of noise abound as well,
including lightning and solar flares, but we will not deal with those
problems here.)"
[ /snip ]
[ SOURCE ]
http://spectrum.ieee.org/telecom/wireless/electronic-noise-is-drowning-out-the-internet-of-things
--
Steve Sacco
NN4X
Narcoossee, FL
EL98jh
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|