From radio antennas to optical fiber — how information rides physical waves through space and glass. Visualize Fourier decomposition, OFDM subcarriers, signal noise and channel capacity live in your browser.
Wave phenomena — from mathematics to modern communications
Signal theory tutorials and deep-dives
More simulations across science disciplines
FFT, filters, sampling, convolution, and frequency analysis — live
Signals and signal-processing simulations make the mathematics of frequency-domain analysis concrete and interactive. Discrete Fourier transform visualisers decompose user-drawn waveforms into sinusoidal components and display amplitude and phase spectra in real time. FIR and IIR filter designers plot magnitude and phase responses from pole-zero configurations in the Z-plane, animating how filter coefficients shape signals passing through them.
Nyquist–Shannon sampling-theorem demos show aliasing artifacts when a signal is sampled below 2f_max and explain why reconstruction requires an anti-aliasing low-pass filter before the ADC. Correlation and convolution animations automate the integrate-and-shift operation that underlies matched filters, autocorrelation measurements, and linear-systems analysis. These tools support signals and systems courses at university level and are used by RF engineers, audio DSP developers, and machine-learning engineers working with time-series data.
Each simulation in this category is built with accuracy and interactivity in mind. The underlying mathematical models are the same ones used in academic research and professional engineering — just made accessible through a web browser. Changing parameters in real time and observing the results is one of the most effective ways to build intuition for complex scientific and engineering concepts.
Topics and algorithms you'll explore in this category
Common questions about this simulation category