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646 Views
Registered: ‎04-23-2018

Time consumed by radix 4 and 2 C models FFTs.

Hi,

I am using Radix 4  and 2 C model FFts configured as 16 point, I have a total data size of 512*256*16*8 . Streaming architecture gives result in 2 min but Radix 4 takes around 8 min and Radix 2 takes around 25 min . Is this acceptable or is there any issue in functioning of FFTs .

 

Can anyone help me?

 

Thanks and Regards,

sarath

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2 Replies
nathanx
Moderator
Moderator
609 Views
Registered: ‎08-01-2007

The Pipeline arch is fastest, and radix-2 arch is the slowest, this is expected.

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590 Views
Registered: ‎04-23-2018

Hi,

As per my understanding in Xilinx we have to wait for a ready signal so Radix 4 and 2 ffts are slower. How will this matter in C code  ?. I am running this code in a pure C environment using visual studio. 

 

Is there any way to reduce this delay.

 

Regards,

sarath

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