Constellation diagram in digital communication

1. What is constellation diagram in digital communication?
2. Why do we use constellation diagram?
3. What is constellation in BPSK?
4. What is Constellation modulation?

What is constellation diagram in digital communication?

A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase-shift keying. It displays the signal as a two-dimensional xy-plane scatter diagram in the complex plane at symbol sampling instants.

Why do we use constellation diagram?

The constellation diagram is useful because it displays both the ideal (reference) signal and the actual measured signal on the same plot. The ideal signal locations of a constellation diagram are pre-defined generically depending on the modulation format chosen.

What is constellation in BPSK?

Constellation Diagram of BPSK The simplest form of PSK is binary phase-shift keying (BPSK), where N = 1 and M = 2. Therefore, with BPSK, two phases (21 = 2) are possible for the carrier. One phase represents a logic 1, and the other phase represents a logic 0.

What is Constellation modulation?

Constellation modulation is the art of encoding information not only in the symbols within a constellation but also by encoding information by selecting a constellation from a set of constellations that are switched from time to time.