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Altera_Forum's avatar
Altera_Forum
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18 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
17 years ago

Hi wronghorizon,

If you have any 7.x version of DSP Builder, I think you can just drop the later version in place of the 7.0 version.

Basically I'm trying to do complex multiplier using the multiply add module in the frequency domain, between the FFT and the inverse FFT.

I'm attaching the screenshot of the multiplication part. In the time being the X and Y multiplier is constant 1 and zero respectively, so that I can get a through dummy processing of the real and imaginary signal (I'm getting the same output as the input stimulus). Later, I would like to implement a kind of windowing function inside the frequency domain, thus X and Y will be inside a ROM module.

Just wondering what is the function of FIFO module?

Thanks,

Regards,

Shaiful