Hi,
I wanted to ask you that in the ofdm_sync_pn.py ( Schmidl and Cox method ) what 
is the role of gr.add_const_ff(-1) line # 78 ?
I am not able to understand that what are we achieving here by multiplying the 
stream by one. As in the orignal algorithm this thing is not present.
Cheers,
Chuck.
                                          
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