Can I add to this - do you simulate a sync pulse input, and wait an adequate time to see it show up on the block output?
Jack On 2 Nov 2014 12:50, "G Jones" <glenn.calt...@gmail.com> wrote: > When you are simulating, do you have the fftshift set appropriately? A > pure sine wave will be the worst case for bit growth and overflow, so > you'll want an fftshift of 0xffff I think. > On Nov 2, 2014 2:11 AM, "Wang Jinqing" <jqw...@shao.ac.cn> wrote: > >> Hi, >> >> I can run the tut3.mdl,but I found the simulation result of wide_band >> fft is not correct. For example I have generate a sine (freq= 1/4pi)wave >> input the KaADC ,I found the polyphase output sine wave is still ok on the >> scope, but after the wide_band_real fft ( after real and image parts >> seperation) and power I even can't find the corresponding spectrum line. >> There're many messy signals on the spectrum. It seems that the fft core not >> works well in simulation. Does someone run into this problem? >> >> Best Regards. >> >> Oliver Wang. >> >> >> >>
