Questions tagged [iir]
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Problem with I2S and IIR-filter
I am working on a system that receives audio data over Bluetooth using a BM83. This is transmitted to an STM32F7 over ADC, an IIR-filter is applied and the data is transmitted out over I2S. The ADC ...
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IIR digital filter: samples not matching the frequency response
I am working on a small project in Mathematica involving a Chebyshev 4th order highpass filter, trying to obtain its digital IIR filter with the bilinear transformation.
I implemented the differential ...
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IIR filter design: detect limit-cycle oscillations
I am studying IIR filters read about limit-cycle oscillations in IIR filters. From what I understand, there are two types of oscillations
Granularity limit-cycle: when signal levels become very low ...
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How to classify filters
I deal with digital signal processing which also deals with filters.
There are 2 main types of filters: Analog and Digital.
To each type there are several classifications such as:FIR/IIR/RCSR(...
user288805
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2
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What sampling rate to use when making IIR filters with an audio sample rate of 44.1kHz?
I am kind of confused as to which sampling rate to use when making an IIR filter if the sampling rates for audio are 44.41kHz, or 96kHz, etc..
My concept and what has been working for me. When people ...
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How can I prevent my IR sensor from sensing the sunlight?
I want to use an IR sensor for object detection. An LED will be turned on if an object is detected. But because of sunlight, it's malfunctioning (i.e. always getting logic 1).
So, how do I omit the ...
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Is my IIR implementation (in C) correct for this difference equation?
I recently started developing a digital regulator for a DCM boost (Digital regulator for DCM Boost - How does it relate to duty cycle?) And I've implemented the difference the following controller in ...
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2
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Why won't my IIR filter work?
I have a cascaded IIR filter that has a sampling frequency of 1kHz and consist of a highpass filter with a cutoff frequency of 0.8Hz and a lowpass filter with a cutoff frequency of 5Hz.
I have ...
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2
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Error implementing IIR filter on FPGA
I want to implement several IIR filters on an FPGA, using VHDL. The filters is for audio.
I start out by implementing a single filter with the following transfer function:
$$H_1(z)=\frac{304 -304z^{-...
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How does an IIR filter change depending on the approximation used? [closed]
What are the main differences between the filters when using Butterworth, Chebyshev type I, Chebyshev type II or Elliptic aproximations.
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Find filter's frequency characteristics from its impulse response
Impulse response is defined as .
Its plot looks like this:
Now I am basically supposed to say what does filter do with incomming signals based on this formula or plot. How can I approach this ...
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Implement IIR SOS structure into FPGA
I try to implement an IIR into my FPGA project. I've got the coefficients from my matlab program and implement the gain directly into the coefficients, though I don't need an additional gain ...
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2
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problem with fixed point butterworth implementation
I have designed a 2nd order Butterworth filter with MATLAB fdatool for VHDL implementation. the cuttoff frequency is less than Fs/10, which should be okay since fdatool uses prewarping.
Indeed, the ...
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ADC sampling frequency - Noise filtering
I have to take the reading of two analog sensors temperature & Fuel level. Both of them are analog signal & i have to remove noise from this reading. And i want to use the Digital filter for ...
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Implementing a very sharp IIR (125Hz sampling rate, 0.2Hz bandwidth)
I am trying to design a IIR lowpass filter. The purpose of this filter is to get pure DC from noises.
The sampling rate is: 125Hz.
The bandwidth of the filter: 0.2Hz.
I designed the filter with ...
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