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Altera_Forum
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19 years ago

FFT/IFFT Unity Gain Example

Here is an example that I did a while back when I was playing with the FFT/IFFT core. It was built with DSP Builder 6.1. Also it incorporates the unity gain formula highlighted in the Block floating ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi wronghorizon,

Thanks, I did manage to solve the non-zero problem by using higher resolution.

Now I'm trying to introduce complex multiplier in between the FFT and IFFT in order to control the output by modifying the original DSP BUilder FFT/IFFT Unity Gain Example (using multiply add module). Since I'm using a constant muliplier of 1 and 0 for each of the complex multiplier respectively, I'm expecting the same result as through, i.e. non-zero real and zero imag output as before.

The problem now, I'm not getting the same result and both output are of the same magnitude with funny shapes. Do you have any idea? I'm attaching the new simulation together with this entry.

Regards,

wimax