phase modulation
Definition
Noun: - A method of signal transmission: Phase modulation is a technique in telecommunications and signal processing where the phase of a high-frequency carrier wave is varied in proportion to the instantaneous amplitude of the modulating signal (e.g., a sound or data signal). This variation encodes information onto the wave.
Usage Examples
- Noun:
- The radio transmitter uses phase modulation for clearer audio signals.
- Digital data can be encoded efficiently using phase modulation techniques.
Advanced Usage
- Technical Context: In engineering, "phase modulation" is often discussed in contrast to frequency modulation (FM) and amplitude modulation (AM). It is a key concept in the study of communication systems.
- The lecture covered the advantages of phase modulation over amplitude modulation for noise resistance.
Variants and Related Words
- Phase-shift keying (PSK): A digital modulation scheme that conveys data by changing the phase of the carrier wave. It is a specific, widely used form of phase modulation.
- Quadrature phase-shift keying (QPSK) is a common type of PSK.
Synonyms
- PM (Abbreviation): The standard abbreviation for phase modulation.
- Angle modulation: A broader category of modulation that includes both phase modulation and frequency modulation.
Related Phrases
- Modulate the phase: The verbal phrase describing the action of applying phase modulation.
- The circuit is designed to modulate the phase of the carrier.
Related Concepts
- Carrier wave: The base high-frequency wave that is modulated.
- Modulating signal: The information-bearing signal (e.g., voice, music, data) that controls the modulation.
Noun
-
modulation of the phase of the carrier wave
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