Advantages of Pulse Amplitude Modulation
- PAM is inexpensive and simple to integrate into a variety of systems because it only requires simple analog circuitry.
- It facilitates the transfer of analog information via digital communication channels without compromising quality by encoding analog signals with discrete amplitude levels.
- PAM transmits analog signals over digital communication networks with ease, making it compatible with contemporary digital communication protocols. This is made possible by its integration with digital systems.
- PAM is simple, it has strong noise immunity and can withstand noise interference both during signal transmission and reception.
- Simple signal processing methods like filtering and demodulation are made possible by PAM, which makes it possible to efficiently extract information from modulated signals for a variety of applications, such as audio transmission and telecommunications.
Pulse Amplitude Modulation
Pulse Amplitude Modulation (PAM) is a key modulation technique used in digital communication for transmitting analog data and is one of the most widely used types of analog-to-digital conversion. Its process is simple where the amplitude of a sequence of pulses changes with the instantaneous amplitude of the analog message signal. The analog signal that is to be modulated is sampled by a sequence of pulses that are amplitude-modulated on the carrier to produce the amplitude-modulated pulses.
The analog signal is sampled at regular intervals to enable the amplitude of pulses due to be produced by the carrier to be varied. The sampled values are quantized to a specific number of quantization levels or discrete levels whereupon the process is repeated. Due to its simplicity of implementation and analysis, PAM is often employed in many applications including digital communication, audio transmission, and instrumentation among others. One of the biggest drawbacks of PCM is its sensitivity towards channel errors, as poor-quality channels will introduce noise and distortion, particularly over larger distances and lower data rates.
Table of Content
- What is PAM?
- PAM Block Diagram
- Types
- Mathematical expression
- Construction
- PAM Circuit
- Solved Examples on PAM
- Applications
- Advantages
- Disadvantages