UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Visitor odc
Visitor
21,138 Views
Registered: ‎06-23-2009

inverse FFT (can't make it work!)

I tried different timings for fwd_inv_we but none of them works (modelsim and ise simulator)

1. Before start 

2. Rising start and fwd_inv_we at the same cycle (page 25 , data sheet)

3.

 

fft core v5.0 - ise 9.2i sp4

pipelined, streaming i/o 

lenght 8

 target clock 200MHz

 unscaled

 truncation

 natural order

distributed ram

 ce

 

 

Matlab 

f   = [ 8 0 0 0 0 0 0 0];

iF = ifft (f);

iF = [1 1 1 1 1 1 1 1];

F  = fft (f);

F  = [8 8 8 8 8 8 8 8];

 

Thanks in advance.

 

waveform

inputoutput

0 Kudos
3 Replies
Visitor odc
Visitor
21,044 Views
Registered: ‎06-23-2009

Re: inverse FFT (can't make it work!)

solved. 
Visitor 19890702mx
Visitor
20,504 Views
Registered: ‎11-14-2009

Re: inverse FFT (can't make it work!)

hi 

i have run into the same qusetion as you .

coun you tell me how you fix it.

please send the project you have finished to my e-mail  601247983@qq.com

thank you.

0 Kudos
Xilinx Employee
Xilinx Employee
20,420 Views
Registered: ‎11-28-2007

Re: inverse FFT (can't make it work!)

Take a look at this message: http://forums.xilinx.com/xlnx/board/message?board.id=DSPTOOL&message.id=2159#M2159

 

Cheers,

Jim

 

Cheers,
Jim
0 Kudos