# Tag Info

Accepted

### How do software equalizers work?

This depends a lot on how you implement it. A single biquad takes about 10 arithmetic operations. (To be precise a Transposed Form II takes 4-5 multiplies and 3 adds, depending on how the gain ...
• 46.2k

### How do software equalizers work?

I don’t think you’re alone, but essentially this is simply a problem of optimization. Let’s say you have a processor with a 88MHz clock. That’s 2k clocks per sample at 44kHz. If we take the term ‘...
• 1,038

### Least Squares Solution Using the DFT vs Wiener-Hopf Equations

Following Royi's derivation, we want to show that, \begin{align} \hat{h} = \arg \min_h||Xh - y||^2 = (X^T X)^{-1} X^H y = IDFT(Y \oslash X) \end{align} where $X$ is a circular convolution matrix ...
• 617
Accepted

### Distortion of OFDM signal when using RRC filter

I checked your code in my PC, you need just to delete the delay added before the filter. For example, you can use: U_aft_fil = U_aft_fil(fil_delay+1:end); Then ...
• 1,056
Accepted

### Does zero-forcing equalizer need known channel impulse response?

If the received signal can be written as $$\mathbf{y} = \mathbf{H}\,\mathbf{x} + \mathbf{n}$$ where $\mathbf{H}$ is the channel matrix, $\mathbf{x}$ is the transmitted vector, and $\mathbf{n}$ is ...
• 675

• 3,042
1 vote

### Programming a parametric equalizer - preventing clipping

kinda funny, i have never seen this post/question before and i was named in a comment, but because it wasn't quite spelled right, SE never notified me. using cascaded biquad parametric EQs to ...
1 vote

### Programming a parametric equalizer - preventing clipping

This looks like a graphic equalizer to me, not parametric, because the filter parameters are fixed. Changing your terminology might give you better results from a search engine. It also looks like ...
• 1,038

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