BPSK, which stands for Binary Phase Shift Keying, is a type of digital modulation technique used in telecommunications and digital communication systems. In BPSK, binary data is transmitted by shifting the phase of the carrier wave.
In this modulation scheme, the binary information is represented by two different phases of the carrier wave. Typically, a phase shift of 0 degrees represents one binary state (usually binary 0), while a phase shift of 180 degrees represents the opposite binary state (usually binary 1). These phase shifts cause a variation in the position of the carrier wave on the phase axis.
BPSK is known for its simplicity and efficiency. It is widely used due to its ability to combat interference and noise, making it suitable for applications in wireless communication, satellite communication, and digital broadcasting.
To demodulate the BPSK signal, a receiver compares the received signal phase with a reference signal. If the phase of the received signal matches the reference signal, the receiver assumes that the transmitted binary data is a '0', and if there is a phase shift of 180 degrees, the receiver determines that the transmitted binary data is a '1'.
BPSK has a symbol rate, which is the number of symbols transmitted per second, and it is used to calculate the data rate or bit rate. The bit rate is typically lower than the symbol rate due to the encoding scheme used to ensure reliable transmission and error detection.
