Sinusoidal Signals

Signal Type

Parameters

Frequency (Hz) 5 Amplitude 1.0 Phase (deg) 0

Discrete-Time

Sampling freq fs (Hz) 50

Key Concept
CT: x(t) = A cos(2πft + φ)
DT: x[n] = A cos(2πf/fs · n + φ)

The phasor Ae^{jφ} rotates in the complex plane at angular frequency ω = 2πf.