A band-pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
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Multiple filters or not?
I'm processing audio signal sampled at 44.1 kHz. After some other processing, I need to filter the signal between ~5-50 Hz. Achieving this for a signal with such a high sampling frequency appears to ...
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bandpass implementing with DWT in matlab
In matlab help in find the implementation of bandpass as following
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Bandpass filter BPSK
I have a question concerning BPSK and the bandpass filter that seems to be sometimes placed before the receiver circuit (the receiver is a mixer and lowpass filter).
Basically, from what I've ...
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What is the most efficient type of software bandpass filter?
I'm writing a C++ application to extract four modulated carrier signals at four separate frequencies, from a single input signal. I've designed four FIR filters at t-filter.appspot.com but they run ...
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SineWave generation and BandPass filter : Audio
Can any one suggest me a Bandpass filter in java which I would like to apply on generated sine wave of a particular frequency
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Feature Selection by Filtering
so there is this paper I'm reading and trying to understand fully: Towards Practical Identification of HF RFID Devices
http://dl.acm.org/citation.cfm?id=2240276.2240278
I don't want to link the PDF ...
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Calculating a filter's attenuation at a certain frequency from the Q-factor
I'm using the Web Audio API to make a graphic EQ with four BiQuad filters; a highpass, two bandpass and a low pass:
You can see each node representing each filter's frequency. It's working nicely ...
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Online filter for EEG
My goal is to build a real-time filter for EEG data. The data are being recorded in 512Hz and I wish to filter it (in a real-time, from 0.5Hz to 30Hz in the most optimal way).
Unfortunately I'm not ...
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The transmitted signal of DPSK
I am very confused about how to get the transmit sequence of the DPSK signal.
In my lecture notes, teacher give as the following example.
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What is the ideal FIR length, given a specific pulse length?
I am trying to ascertain what the 'ideal' FIR filter length should be, given the pulse length $T_p$ of a windowed sinusoid in noise that I seek to filter.
As parameters into an FIR filter that I ...
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All-pass filters to remedy group delay
I would like to sum a filterbank made of bandpass butterworth filters to reconstruct an audio signal. Given group delays for each channel shown in the following plot . . .
How would I go about ...
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Is it correct to subtract a low-pass filtered signal from the original signal and use the result as a “high-pass”?
I am having a hard time trying to find documentation to implement band-pass or high-pass filter with python/scipy/numpy.
I can easily create and apply a low-pass filter, though, so I ask:
Would it ...
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Vocoder carrier wave bleed
I made a terrible vocoder earlier and got some help on it here:
My vocoder sounds bad
My new implementation is much better. I'm using the band pass filter described in the document suggested on the ...
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change the frequency component of a spectrum in an audio file
I am working on an audio dynamic range compressor using Matlab.
After calculating the FFT of the audio file, I use several bandpass filters to amplify specific bands separately.
What I want to do then ...
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284 views
What bandpass filter design will yield the shortest impulse response?
Designing a simple 2nd order IIR bandpass Buterworth filter with a centre frequency of 500 Hz and a 1 octave bandwidth gives me the following frequency response ...
Now, if I take the impulse ...
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390 views
How can I break a filter down into second order sections?
This is a follow-up question of How do I apply a Chebishev filter? I designed a filter in Scipy:
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How do I apply a Chebishev filter?
I read a paper about a brain-computer interface. In this paper the authors reported "each signal has been filtered with an 8-order band-pass Chebishev Type I filter which cut-off frequencies are 0.1 ...
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Understanding a Bainter Circuit (chebychev filter)
As part of a class in Signal Processing, I am building a 3rd order Chebychev band reject filter. We implement this by using three cascading Bainter circuits. Although not part of the class, I have a ...
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When is aliasing a good thing?
In Hamming's book, The Art of Doing Science and Engineering, he relates the following story:
A group at Naval Postgraduate School was modulating a very high
frequency signal down to where they ...
