demodulate
Học thuậtThân thiện
Definition
Verb: To extract the original information-bearing signal from a modulated carrier wave. This is the reverse process of modulation, which encodes information onto a carrier wave for transmission.
Usage
The verb "demodulate" is used in the context of electronics, telecommunications, and signal processing. It describes the specific technical action performed by a device (a demodulator) to recover the original data or signal. It is typically used with an object (what is being demodulated).
Examples
- The receiver must demodulate the incoming radio signal to hear the audio.
- This circuit is designed to demodulate the amplitude-modulated (AM) broadcast.
- The software can demodulate the digital data stream from the satellite transmission.
Advanced Usage
- Technical Context: In software-defined radio (SDR), a computer algorithm is used to demodulate signals, replacing traditional hardware circuits.
- Process Description: The term is often used to describe a key stage in a communication system: "The signal is amplified, filtered, and then demodulated."
Variants and Related Words
- Demodulation (noun): The process or action of demodulating.
- Demodulation is a crucial step in any radio receiver.
- Demodulator (noun): A device or circuit that performs demodulation.
- The demodulator in your phone extracts the voice data from the cellular signal.
- Modulate (verb): The opposite action; to impose a signal onto a carrier wave.
Synonyms
- Decode: Often used interchangeably in digital communications, though "decode" can imply additional steps like error correction after demodulation.
- Detect: A historical and less precise synonym, especially in the context of "detecting" an amplitude-modulated signal.
Related Technical Phrases
- Demodulate a carrier: The full technical phrase specifying what is being acted upon.
- The chip's function is to demodulate the carrier and present the baseband data.
Verb
- extract information from a modulated carrier wave