# filter-design's questions - English 1answer

680 filter-design questions.

### FIR filter design: evaluating the error function

1 answers, 45 views matlab filter-design fir complex

### 1 Where to learn about “analog prototype filters”?

Where to learn about "analog prototype filters"? I've heard about them, but I'm unsure about what they really are and how they're constructed.

### 2 Estimate smartphone accelerometer bias

I was planning to develop Android / iOS applications that enable users to measure 3D length using their smartphones. According to this question, you need to know at least the time-varying bias that ...

### 1 Looking for a simple and effective notch filter

1 answers, 159 views filters filter-design
I ran a finite-difference simulation and the behavior of an output signal, $s$, in time, $t$ (sampled with period $\Delta t$) behaves approximately as in the figure below. It is well-described by a ...

### Least Squares with Non Zero Mean Noise

1 answers, 122 views filters filter-design noise least-squares
What happens if the noise has no zero mean? I mean, if the exercise is something like: $$y(k) = A x + \eta(k)$$ When I have zero mean, I start from: $$y = A x$$ $$\Rightarrow \hat{y} = A \hat{x}$$ ...

### 2 Given Gain function, how to design a causal, stable and minimum phase IIR filter?

I am given $|H(\omega)|$, I wonder if minimum phase stable causal filter is unique and how to calculate it.

### Parameters of Butterworth filter that approximates the amplitude response of a Gaussian filter?

1 answers, 153 views filters filter-design gaussian butterworth
For a given narrowband Gaussian filter with a specific central frequency and filter width, I need corners of a bandpass Butterworth filter whose amplitude response is close enough to the Gaussian ...

### 5 Is there a z-transform like for variable sampling rate signals?

1 answers, 157 views filter-design z-transform filtering
I'm working with signals with variable sampling rate (the time space between samples is not constant). I know the delay between samples but I don't wont to interpolate the signal. Is there a way to ...

### 3 Filter design to realize Cauchy product

1 answers, 126 views filter-design convolution fourier

### The desired frequency-response specifications

1 answers, 29 views filter-design frequency-response
The complex function $D (e^{-jw})$ is defined on the domain of approximation $\Omega$ .In most cases the domain $\Omega$ is the union of several disjoint frequency bands which are separated by ...

### Root raised cosine pulse shaping filter

2 answers, 1.056 views matlab filter-design nyquist
What are disadvantages of root raised cosine pulse shaping filter in digital communications and why does it need to be improved? Links: Square Root Raised Cosine Fractionally Delaying Nyquist ...

### How to calculate the scale factor for Laplacian of Gaussian

0 answers, 13 views filter-design image gaussian-kernel
Trying to implement the LoG with different kernel size and sigma. Been reading this post: Introduction to IP : Laplacian of Gaussian? Which mention a scale factor of approx 482 for a 9x9 size kernel ...

### Wavelets and bank filters

The wavelet transform has a problem as it gives poor time resolution for low frequencies and poor frequency resolution for high frequencies according to uncertainty conditions. This appears well ...