[casper] wide_band_real fft simulation problem of tut3

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

Re: [casper] wide_band_real fft simulation problem of tut3

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 0x 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

Re: [casper] wide_band_real fft simulation problem of tut3

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