> I have studied in the literature that phase noise can be described as
> sampled version of wiener process, but for the purpose of analysis and
> simulations a discrete time random walk or weiner levy process is used.
> What exactly is this weiner levy process, how could i model it in matlab?
The Wiener process is a special case of the Levy process.
For your purposes, it's probably sufficient to generate a Wiener
process by:
x = randn(N.1);
h = some filter with the appropriate Fourier transform
y = conv(x,h);
Basically generate a discrete-time white Gaussian sequence and then
filter it using filter h. Choose h according to what you want. I have
seen
phase noise models where h is a lowpass filter, for example.
Hope that helps,
Julius
Reply by aamer●January 15, 20072007-01-15
Dear all,
I am modelling phase noise for OFDM systems. At the receiver
r=s*exp(j*phi)+w
r= received signal
s=transmitted signal
phi=random phase
w = AWGN noise
I have studied in the literature that phase noise can be described as
sampled version of wiener process, but for the purpose of analysis and
simulations a discrete time random walk or weiner levy process is used.
What exactly is this weiner levy process, how could i model it in matlab?