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A Query about "Improvements to the Sliding DFT Algorithm"

Started by etheory 6 months ago7 replieslatest reply 3 months ago255 views
Hi all! My first post here! Long time lurker first time poster. This one is kinda specifically directed at @RickLyons but happy for anyone to answer. I am reading: https://www.researchgate.net/publication/352874961......

Circular convolution

Started by RoelVugts 3 months ago10 replieslatest reply 3 months ago242 views
When performing an FFT, modifying the magnitude spectrum in some arbitrary way, and then applying an inverse FFT, how should I handle circular convolution? How can...

Instantaneous frequency direction of human speech

Started by kman 3 months ago7 replieslatest reply 3 months ago183 views
For SSB (Single Side Band) modulation I use Prosch’s [1] IIR all-pass filters as per below:For a single Cosine tone, with a frequency from the range above, the...

Packet Based Equalization in Multipath Environment

Started by tkuraku 4 months ago3 replieslatest reply 3 months ago136 views
Imagine a simplified communication channel that consists of 2 multipath terms that are about the same amplitude modeled with an FIR filter [1 0 0 0 0 0 0 0 0 0...

IIR Filter Implementation in the Frequency Domain?

Started by Gsparky2004 4 months ago11 replieslatest reply 4 months ago240 views
Silly question: Is it possible to implement a IIR filter in the frequency domain just as you would a FIR filter? Or is the answer, "Well, you COULD, but that's a...

FM demod using derivatives

Started by napierm 4 months ago10 replieslatest reply 4 months ago225 views
I'm looking again at an FSK demodulator.Currently using an arctan followed by a derivative which is giving good results.  fred harris always recommends:f ~= (dI...

A Taylor Series Question

Started by Rick Lyons 4 months ago9 replieslatest reply 4 months ago289 views
I was wondering. Was the Taylor series invented by Taylor Swift?

The error of manually computed inverse FFT increase along x-axis

Started by liwang 4 months ago9 replieslatest reply 4 months ago137 views
1Hello, I am manually compute the inverse FFT using the NumPy FFT components by the below codes, to compare the rebuild signal with the original signal (sin function)....

Real to IQ in software, image reject mixer.

Started by beaka 4 months ago3 replieslatest reply 4 months ago227 views
Hi, I experimented with some code to do the conversion from real (analog signal) to IQ for digital processing in Octave to implement an SSB receiver.The reason is...

How to render formulas?

Started by DanBoschen 4 months ago3 replieslatest reply 4 months ago197 views
I am able to render mathjax in posts but have had to do that by enclosing the code in two dollar signs which puts the equations on a new line by themselves such...

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