What does this mean? The elliptical constellation in the QPSK constellation diagram?

1. What is constellation in QPSK?
2. What is the explanation of constellation diagram?
3. What does the distance of point from origin indicate in constellation diagram _____?
4. What is constellation in BPSK?

What is constellation in QPSK?

QPSK uses four points on the constellation diagram, equispaced around a circle. With four phases, QPSK can encode two bits per symbol, shown in the diagram with Gray coding to minimize the bit error rate (BER) – sometimes misperceived as twice the BER of BPSK.

What is the explanation of constellation diagram?

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.

What does the distance of point from origin indicate in constellation diagram _____?

1). In a polar diagram, magnitude is represented by the distance of the point from the origin, while the phase is represented by the angle from the horizontal axis to the line formed from the origin to the point.

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.