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IT
4th Semester
IT-404
Unit 1 Notes

IT-404 Analog & Digital Communication Unit 1 Notes

Notes and important questions for unit 1: Signals and Systems.

Unit 1 · Short notes Signals and Systems Block diagram of a communication system · Signal definition and classification (continuous, discrete, deterministic, non‑deterministic, periodic, non‑periodic, energy, power, analog, digital) · Electromagnetic spectra · Standard signals: DC, sinusoidal, unit‑step, ramp, signum, rectangular pulse, impulse ($\delta$) signal · System definition and classification (linear, non‑linear, time‑variant, time‑invariant, causal, non‑causal, stable, unstable) · Fourier Transform: time‑domain and frequency‑domain representation of signals

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