VNC tools
August 18, 2009
VNC packages +ves
UltraVNC easy movement of files, looks better than tightVNC but not as good as RealVNC
TightVNC easy movement of files + works with mac natively
RealVNC faster and better looking , more polished vivek’s Vote
Of Course all of these do most of the major stuff
http://www.realvnc.com/cgi-bin/download.cgi
Norms, Crest factor and multitones
August 18, 2009
Norms and Crest Factor
An n – norm 
is defined as
The most common norm is 
& 
= rms value
and
= max( |u(t)| )
The creast factor of a non-zero signal is defined as the ratio of peak to rms value
CF(u) = 
1
A CF of 1 indicates a signal which only stays at 
Therefore a signal with a low crest factor spends most of the time near the peek values.
A creast factor of 1 implies a square wave of amplitude
In terms of amplitude distribution –
, where 
is the total length of set E
the proportion of the time a where |u(t)| > a
= min{a|
=0}
and
Which is a weighted integral of the amplitude distribution or if we plot a graph of vs a, 
is the 
todo: update the crest factor definition in Wiki http://en.wikipedia.org/wiki/Normed_vector_space
Crest factor of a multi-tone Signal
For a following multitone signal with N tones
We have mean, = 
, regardless of phase 
The goal is to minimize the crest factor
