June 2006
Intermediate to advanced
344 pages
15h 43m
English
Content preview from Ultra Wideband Systems
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162
Chapter 5
instantaneous bandwidth. In the case of a frequency-hopping system that uses m
hops, the equation above may be rewritten as
W
Cm ---log2(l+mS/N)
m
For m greater than one, C~ is always less than C, so using the wider instantaneous
spectrum enables a potentially larger channel capacity.
5.8.5 Fading Immunity
Wireless channels subject to multipath distortion are subject to frequency selective
fading. The distribution of the severity of the attenuation at any frequency follows a
Rayleigh distribution. At some frequencies, the SNR is very good, and at others it is
very poor.
Different modulation ...
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