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Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 9 years ago19 replieslatest reply 3 months ago3159 views
It's been a few months since the launch of the new forums.  Here are a few thoughts. The thumbsup and beer buttons    If there is one thing that could have a...

OFDM receiver IQ processing

Started by jekain314 2 days ago8 replieslatest reply 8 hours ago96 views
The OFDM receiver front end operates on a real signal from the antenna. The receiver's IQMixer both downconverts the received signal to baseband and transforms the...

Circular convolution

Started by RoelVugts 1 week ago10 replieslatest reply 5 days ago181 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 2 weeks ago7 replieslatest reply 2 weeks ago163 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 weeks ago3 replieslatest reply 3 weeks ago124 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...

Help with Shannon-Nyquist Reconstruction Artifacts in Interactive DSP Tool

Started by Theau 4 weeks ago3 replieslatest reply 4 weeks ago160 views
Hello DSPrelated community,I'm developing an interactive web application for learning DSP concepts as part of a university project (project overview: https://thierrydutoit.github.io/iDSP/)....

IIR Filter Implementation in the Frequency Domain?

Started by Gsparky2004 2 months ago11 replieslatest reply 4 weeks ago209 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 1 month ago10 replieslatest reply 1 month ago200 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 2 months ago9 replieslatest reply 1 month ago271 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 1 month ago9 replieslatest reply 1 month ago131 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)....

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