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Signal Processing

Questions tagged [polyphase]

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53 questions
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I am currently working on an oversampled polyphase channelizer receiver. The input signal contains M channels, each centered at a frequency Fc, and the input is sampled at a frequency Fs. For the sake ...
EngineerPhysicist's user avatar
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1 vote
0 answers
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I am designing a QPSK trasmitter targeting FPGA. I need to design a shaping filter (SRRC). I know understand that I should do that using upsampling and interpolation. The DAC sampling rate is 5GHz. ...
Ahmad Zaklouta's user avatar
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2 votes
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I'm currently reading this paper on polyphase filterbanks: 📄 Polyphase Filterbanks I'm trying to wrap my head around Equations (38) and (39): $$ \begin{aligned} Y(k, n_0) &= \sum_{p=0}^{P-1} y_p(...
Mauro's user avatar
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3 votes
2 answers
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I am trying to debug an implementation of a polyphase decimated biquad IIR filter. The difference equation for this filter is $y_{(\downarrow L)}[i] = y[iL] = \displaystyle\sum^{L-1}_{l=0} \left( \...
Pete's user avatar
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1 answer
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I'm hoping someone can help me with this maximally decimated polyphase channelizer I've coded up. This is based on the fitler_ten_a code from the book "Multirate Signal Processing for ...
rtclark's user avatar
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1 answer
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I would like to know whether there is a condition in selecting the number of channels $M$ and filter length $N$. As of now I am trying to design a channelizer where the data length $M$ is much less ...
Ariya Krishnan's user avatar
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1 answer
253 views

What is the logical reason behind this? Why are P1,P2, P3, P4 codes unaffected by doppler shifts?
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3 votes
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I am trying to design a simple half-band complementary filter bank following this paper. I don't have a Matlab license at the moment, so I am trying to implement it in Python, but I'm running into ...
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