Digital and Wireless Communications
Tools and Visualizations

Analyze and visualize discrete Fourier transform spectra interactively, exploring how signals are represented in the frequency domain.

Visualize how rectangular and modulated pulses appear in the frequency domain by adjusting pulse duration, amplitude, and carrier frequency.

Visualize the electric far-field around an oscillating charge, with interactive controls to explore radiation patterns and field behavior.

Explore BPSK, QPSK, and 16-QAM modulation schemes with adjustable carrier frequency and symbol duration parameters.

Decompose cosine waves into in-phase (I) and quadrature (Q) components, and manipulate I/Q sliders to match a target waveform.

Explore a full OFDM transmission and reception chain with 8 subcarriers — configure modulation schemes, view IFFT outputs, and analyze IQ constellations under AWGN.

Understand how frequency spacing ensures orthogonality across multiple subcarriers by adjusting frequencies and symbol duration and observing Fourier transforms.

Generate a tone or live microphone signal and route it through a low-pass, band-pass, or high-pass filter, with real-time time- and frequency-domain scopes and the filter's frequency response.

Explore what makes a system linear, with interactive visualizations of superposition, scaling, and how a system transforms an input signal into its output.