[RFI] [ iEEE.org ] "Electronic Noise Is Drowning Out the Internet of Things"

[Steve Sacco NN4X]

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