This emulator was generated by Claude (Anthropic) for the Wireless 101 course materials. Unlike the Transformer demo next door, almost everything here is really computed in your browser: the diffuse fading is a Zheng & Xiao sum-of-sinusoids Jakes fader, the Rician component is a genuine line-of-sight phasor of amplitude √(K/(K+1)), the frequency response is a real 4096-point FFT of the sampled impulse response, and the coherence bandwidth is measured off the frequency correlation curve rather than printed from a rule of thumb. The Model self-check box compares the emulator's measured envelope statistics against their closed-form values, live, so you can see it is not lying.
Textbook constants are named, not presented as universal. Different books use different ones. This page uses Bc ≈ 1/(5στ) for 50% correlation and Tc ≈ 0.423/fd (= √(9/16π)/fd), which are the same two the Module 8 lesson deck already teaches.
Jakes fader: Y. R. Zheng and C. Xiao, “Simulation models with correct statistical properties for Rayleigh fading channels,” IEEE Trans. Commun., vol. 51, no. 6, pp. 920–928, June 2003. Coherence bandwidth / coherence time / level-crossing rate / average fade duration: T. S. Rappaport, Wireless Communications: Principles and Practice, ch. 5. Tap profiles: ITU-R M.1225 and 3GPP TS 36.104 Annex B.
One thing here is NOT verified and says so on screen. The standardised tap profiles (ITU Pedestrian A / Vehicular A, 3GPP EPA / EVA / ETU) are real published profiles, but this page was written with no network access and no copy of either standard in the repository, so their delays and powers were transcribed from the author's knowledge rather than read off the document. Selecting one raises a visible “verify against the source” flag. Do not remove that flag by asserting the numbers are right — remove it by checking them, and record who checked. No number on this page is a measurement of a real radio link. There is no channel sounding data in this repository and inventing some would be the worst thing this page could do.
Course demo — linked from the lesson deck in both languages; the page itself is English‑only for now. Built for WRL-101 Module 8, Lesson 8.3. Move the knobs and watch five linked views move together: the impulse response, the phasor sum that explains why a signal fades, the envelope over time, the frequency response, and the distribution the envelope obeys. Everything is recomputed from the model on every change, with a seeded generator, so the same settings always draw the same picture.