enjoypercy
Joined: 31 May 2005
Posts: 6
|
 12 May 2006 4:53 Re: a question about frequency estimation! |
|
|
|
|
here are more details:
the frequency estimation makes use of correlation between sampled points.
| Code: |
for n=1:1:length(r_sample)-1
R(n)=conj(r_sample(n))*r_sample(n+1);
w(n)=angle(R(n))*sample_num/T;
end
delta_f=mean(w)/(2*pi); |
the r_sample is the output of DDC with 8 points per symbol. Because of the discretness, there are some points between ±1(for BPSK). But they do impact the estimation result, so how to handle them?
Thanks for help!
[/img]
|
|
