Advantages and Disadvantages of Digital Communication over Analog Communication
ADVANTAGES
OF DIGITAL COMMUNICATION OVER ANALOG COMMUNICATION
1.
"Regenerative repeaters" are used to provide a robust, error-free
signal at a high power level.
2. Compared
to analogue circuits, digital circuits are less prone to distortion and
interference.
3. Through
error identification and repair, digital systems may achieve extremely low
error rates and great signal fidelity.
4. Compared
to analogue circuits, digital circuits are more dependable and can be created
at a cheaper cost.
5. Compared
to analogue circuits, digital hardware allows for more flexibility in
implementation.
6. Using Time
Division Multiplexing (TDM) to combine digital signals is easier than using
Frequency Division Multiplexing to combine analogue signals (FDM).
7. In
transmission and switching, different types of digital signals (data,
telegraph, telephone, television) can be treated as identical signals - a bit
is a bit.
8. Signal
processing functions that prevent against interference and jamming, as well as
encryption and privacy, are naturally suited to digital approaches.
9. In
addition, a lot of data is sent from one computer to another, or from digital
instruments or terminals to computers. Digital communication channels are, of
course, ideally suited to such digital terminations.
10. Voice,
data, and video storage and retrieval at intermediate locations (in the
transmission channel) is simple and economical in terms of storage space.
11. Signal and image processing techniques, such as speech and image signal compression, are easy to process.
12. Adaptive equalisation is a viable option.
13. To preserve high levels of communication confidentiality,
very sophisticated encryption and decryption methods are available for digital
data.
14. The availability of powerful microprocessors, bigger
memory devices, and a huge number of programmable logic devices has simplified
the design of digital communication systems.
15. The switching theory, a mathematical theory of logic
circuits, is a particularly useful perception in digital communication.
16. In digital circuits, noise, temperature, and parameter
fluctuations have a minimal influence.
DISADVANTAGES OF DIGITAL COMMUNICATION OVER ANALOG
COMMUNICATION
1. When compared to analogue systems, digital systems require
a lot of signal processing.
2. Digital systems must devote a large portion of their
energy to varying levels of synchronisation.
3. In digital communication systems, non-graceful degradation
can occur when the signal-to-noise ratio falls below a given threshold, causing
the quality of service to abruptly transition from excellent to bad.
4. Compared to analogue communication systems, digital
communication systems require higher bandwidth.
5. When compared to analogue components, digital components
use greater power.