Signal Processing & Telecom
7 demosSignal processing and communications — modulation, carrier recovery, and adaptive filtering.
QPSK constellation
A QPSK modulator mapping a bit stream onto the four constellation points — the workhorse of digital comms.
PLL carrier locking
A phase-locked loop acquiring and tracking a carrier — phase error driving to zero as the loop locks.
LMS adaptive equalizer
A 3-tap LMS adaptive filter learning the inverse of a scalar channel gain — adaptive equalization in action.
AGC + PLL signal chain
An automatic-gain-control front end feeding a PLL on a fading carrier — a small but complete receiver chain.
Hampel outlier rejection
A Hampel median filter knocking out impulsive outliers from a noisy signal while preserving the underlying trend.
Allan-variance estimate
A running Allan-variance estimate — the standard tool for characterizing oscillator and sensor noise.
More in this category
- Audio dynamic-range compression
- Audio clip distortion
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