JDSP

JDSP is my attempt at creating a Java library capturing some of the functionality that I enjoy in Python 

• matplotlib - Plotting library

• numpy - Numerical computing

• scipy.signal - Signal processing

• Updates (Jan 2026)

• Updated to use Java 21 

  • Swapped to use `jdk.incubator.vector`

This includes filter design functions:

• Square Root Raised Cosine

• Windowing Method

  • Bartlett

  • Hamming

  • Hanning

FilterObject  is a convenience function to store the designed filter so that it may be applied.  This can be updated to store the internal state of the filter.

• Convolution

• Matrix operations

  • Row operations

  • Determinant

  • Gauss-Jordan Elimination

• Vector operations 

  • Process 2 vectors:

    • Element-wise add/divide/multiply/subtract

    • Dot product

  • Process over all elements (product, sum, L1 norm, L2 norm)

A number of plots are available to allow for analysis in Java.  I put less emphasis on this when I realized I can use PyJnius to call Java from Python.  This would allow me to use plots from matplotlib instead.

• Line Plot

• Spectrogram

• TableUI

SpectrogramFrame is available as a standalone application to load a file an analyze the spectrogram.  This is called by "java -cp jdsp-1.01.jar net.kcundercover.jdsp.swing.SpectrogramFrame"