[Discuss-gnuradio] CFO in OFDM

[David Halls]

Dear all,

 

I am suffering from issues related to residual CFO error manifesting itself as a slight rotation over time. This can be partially corrected in the FD using tracking pilots which I have implemented but there is still a slight problem which may be caused by ICI.

 

In the OFDM example code, how is the value for the Frequency Mod sensitivity (-2/FFT_len) derived? Has anyone implemented other CFO estimation blocks for OFDM systems, other than the Schmidl and Cox technique?

 

Regards,

 

David

 

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David Halls Ph.D.

Research Engineer

Toshiba Research Europe Limited

32 Queen Square, Bristol, BS1 4ND, UK

Tel: +44 (0) 117 906 0790

 

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