[Discuss-gnuradio] Why packet decode failure happen when fft-length is set to 64?

[Yingjie Chen]

Hi guys,
Thanks in advance. I am using usrp2 in OFM example. When I set
fft-length to 64, subcarrier to 32,the receiver cannnot decode the
packet correctly. The whole chunk of received data are almost false.
However, when I set fft-length to 128, subcarriers to 64, nearly all
packets can be decode correctly. I feel so confused about that. Does
anyone know that?

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