[MLB-WIRELESS] ./: Can 802.11 Become A Viable Last-Mile Alte rnative?
Bryce Letcher
bryce at letchers.net
Wed May 15 09:48:33 EST 2002
<snip>
Tony Langdon writes:
Do a Fourier transform on a narrow pulse one day. :-) A pulse of "infinite
height" and zero duration has a spread of energy from zero to infinite
frequency (obviously physically impossible, but that's the mathematical
result). That implies infinite bandwidth. A narrow pulse of finite width
contains a broad range of frequencies (again, this can be proven
mathematically).
This is demonstrated regularly by GSM mobiles, which interfere with
EVERYTHING else because they emit a narrow, high amplitude pulse at 217 Hz.
What a f...ing stupid idea that was!!!
Bryce
<snip>
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