Binary phase shift keying

Binary Phase-shift keying (BPSK) is a digital modulation scheme that conveys data by changing, or modulating, two different phases of a reference signal (the carrier wave). The constellation points chosen are usually positioned with uniform angular spacing around a circle.

1. Where is binary phase shift keying used?
2. How does BPSK modulation work?
3. What is BPSK and QAM?
4. What is the phase shift in BPSK?

Where is binary phase shift keying used?

It is widely used for wireless LANs, RFID and Bluetooth communication. Any digital modulation scheme uses a finite number of distinct signals to represent digital data. PSK uses a finite number of phases, each assigned a unique pattern of binary digits.

How does BPSK modulation work?

The modulation of BPSK is done using a balance modulator, which multiplies the two signals applied at the input. For a zero binary input, the phase will be 0° and for a high input, the phase reversal is of 180°. Following is the diagrammatic representation of BPSK Modulated output wave along with its given input.

What is BPSK and QAM?

QAM is widely used multi-level modulation technique, with a variety of application in data radio communication system. BPSK is a simple but significant carrier modulation scheme. The design of modulation and demodulation is done through Very Large Scale Integration (VLSI) system design environment.

What is the phase shift in BPSK?

Binary PSK is the simplest type of phase-shift keying. It is also known as Phase Reversal Keying (PRK) or 2-phase PSK. BPSK has two phases, each separated by 180°. In this technique, two phase-reversals on the sine wave carrier occur at 0° and 180°.