Free interactive reference covering 12 radar modules with full formula derivations: propagation, range, Doppler, pulse compression, CFAR, STAP, and MIMO.
Key Takeaways
The range-Doppler ambiguity product R_u × v_u = c²/(8f_c) is fixed by carrier frequency alone; no PRF choice escapes this constraint.
Pulse compression (LFM chirp) breaks the energy-resolution trade-off: ΔR = c/(2B), independent of pulse duration T, with compression gain G_c = B·T.
CFAR section covers all four variants (CA, GO, SO, OS-CFAR) and maps each to the specific failure mode it addresses.
The radar range equation is built from first principles; the R⁴ term means doubling detection range demands 16x more transmit power or 4x more antenna gain.
MIMO virtual array section shows how N_t × N_r virtual channels multiply angular resolution beyond what a phased array of the same physical size can achieve.
Hacker News Comment Review
Commenters agreed the formula coverage is comprehensive but the site fails as a learning tool: no structured path through the material, so it reads as a reference dump rather than a curriculum.
UX execution drew consistent criticism: sliders are hard to locate, instructional text is unreadable, and interactive elements don’t reinforce the concept being introduced.
One commenter attributed the lack of pedagogical coherence directly to AI generation, arguing hand-crafted interactive tutorials show intentional design that this site lacks.
Notable Comments
@HNisCIS: “These interactive tutorials used to be better when they were made by hand” – frames the core problem as AI-generated content substituting volume for intentional design.
