Costas Loop Demodulator

An explanation about the working principles of the Costas Loop demodulator, used for carrier recovery and carrier synchronization.

First invented by John. P. Costas, the Costas Loop is a clever design that enables demodulation of double-sideband carrier-suppressed signals.

The Costas Loop is a natural demodulator for BPSK digital signals and, in this video, Gregory explains how it works and how is can be used to demodulate higher order constellations, like QPSK and 8PSK.

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A related video about Clock Recovery PLL: https://youtu.be/HcYFFlsSLrg

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