Non-central chi-squared PDF — non-centrality λ, Matlab & Python
Non-central chi-squared distribution: PDF with non-centrality parameter λ, relation to Rician power / energy detection, and Matlab/Python sampling examples.
non-central chi squared
Chi-squared distribution PDF — degrees of freedom, Matlab & Python examples
What a chi-squared distribution is, how degrees of freedom shape the PDF, and how to sample/plot it in Matlab or Python — used in energy detection and confidence regions.