# Questions tagged [zeros]

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### How to estimate a transfer function from a magnitude-only frequency response?

Given an arbitrary frequency response, what signal processing methods might exist that could guess, estimate or determine a transfer function (pole and zero constellation) which gives a "reasonably ...
• 35.4k
20k views

### Why more poles than zeroes?

I read that an "improper system" "has more zeros than poles; it is not causal, cannot be implemented, has a strictly proper inverse and has infinite high-frequency gain." Does causality fail due to ...
• 625
81 views

### What is the zero in this transfer function?

What is the zero for the following transfer function, $-1/2$ or $-2$? $$H(s) = \frac{2s +1}{(s + 3)(s + 2)}$$ This appears to give a zero of $-1/2$. I can transform this into the standard form ...
• 286
2k views

### FIR or IIR filter from poles and zeros

Is it possible to differentiate between Finite Impulse Response (FIR) filters and Infinite Impulse Response (IIR) filters just by knowing the poles and zeros of the system? If yes, how? If not, why?
• 43
1 vote
92 views

### Showing processes as an Equation

I have developed an algorithm that counts the number of times a particular block (within a 2D block) crosses zero. Here's an example: ...
• 485
1 vote
206 views

### What's wrong with having as many zeros and poles as wanted in the transfer function H(z)?

I'm learning about Z-transforms and transfer functions in DSP. Suppose I have the following transfer function: $H(z) = \frac{1}{z-0.5}$ I want to find the corresponding $h(n)$. If I factor out \$z^{-...
• 113
1 vote
342 views

### Hidden Markov Models - Identifying Phonemes

I'm developing a project that identifies Phonemes to be able to identify whether someone is saying either "Yes" or "No". So far in the project, I have used Zero-crossings to identify what the person ...
• 485