BPSK (Binary Phase Shift Keying) modulation is a digital modulation scheme where data is represented by varying the phase of the carrier signal between two states, typically 0° and 180°. Each phase shift corresponds to a binary digit (0 or 1). BPSK is known for its simplicity and robustness against noise, but it has a lower data rate compared to more advanced modulation schemes.
What is modulation? Briefly defined.
Modulation is the process of varying a carrier signal’s properties, such as its amplitude, frequency, or phase, to encode information for transmission. This technique enables efficient transmission of data over communication channels by adapting the signal to overcome channel impairments and interference.
Modulation in aviation refers to the process of encoding information onto a radio signal for communication purposes, such as transmitting air traffic control instructions or aircraft data. This ensures clear and reliable communication between aircraft and ground stations or between aircraft.
QPSK (Quadrature Phase Shift Keying) modulation is a type of phase modulation where data is transmitted by changing the phase of the carrier signal to one of four distinct states (0°, 90°, 180°, and 270°). Each phase shift represents two bits of data, allowing for higher data throughput compared to simpler modulation schemes like BPSK.
The modulation percentage is not a standard term used in communication theory. If referring to modulation depth or efficiency, it typically measures how effectively the carrier signal’s properties are varied to encode the information, which affects the overall quality and data rate of the transmission.
