Preamble in CFO

Hi all,

In preamble based frequency offset estimation for OFDM, the literature
says about 'identical parts'. 

More clearly, let the preamble consists of 2 OFDM symbols S1 and S2. It is
given that S1 has L1 identical parts and S2 has L2 identical parts. 

Does this mean, out of 256 symbols in S1, L1 symbols should be same???? If
so, what should be the value of L1 and at what position in S1????

or, has it got some different meaning????

Thanks in advance

On Mar 1, 7:51 am, "aamer" <raqeeb...@yahoo.com> wrote:
> Hi all,
>
> In preamble based frequency offset estimation for OFDM, the literature
> says about 'identical parts'.
>
> More clearly, let the preamble consists of 2 OFDM symbols S1 and S2. It is
> given that S1 has L1 identical parts and S2 has L2 identical parts.
>
> Does this mean, out of 256 symbols in S1, L1 symbols should be same???? If
> so, what should be the value of L1 and at what position in S1????
>
> or, has it got some different meaning????
>
> Thanks in advance


If you are more clear about what "literature" you are
referring to, you will get more help.  At this point
I have very little idea what you are referring to, and
what algorithm / method you are trying.

Granted, I am not an expert in OFDM but I can think of
many, many ways to use pilot symbols to estimate frequency
offset and I have no idea which one you are referring to.
There must be mols of papers on OFDM by now! :-)

Hope this helps somehow.
Julius