[Discuss-gnuradio] spu fft display

[Chuck Swiger]

Here's a hastily put together demo of using gcell.fft_vcc in a  
usrp/fft gui, running at d=64 and fft_size=2048, using 6 spus:

http://www.swigerco.com/spu_fft_2048_d64.jpg

the ppu usage tops at about 90%. You can trade off d=32 for fft_size=1024.
There is no windowing in gcs_fft_1d_r2.c at the moment.

--Chuck