Q.Give the advantages of digital communication system.

Compared with analog transmission, digital communication offers superior noise immunity, signal-processing capability, and ease of multiplexing and storage.

1. Noise immunity: digital signals (discrete levels) are far less affected by noise than continuous analog signals, since a receiver only needs to distinguish a 0 from a 1.
2. Signal regeneration: digital signals can be exactly regenerated at repeater stations along a long transmission path, avoiding accumulation of noise and distortion.
3. Multiplexing: multiple digital signals can be easily time-division multiplexed onto a single channel, improving channel utilisation.
4. Compatibility: digital signals are directly compatible with computers, enabling easy storage, data compression, encryption for security, and error detection/correction coding. …