Digital Frequency Modulation Also Known as Frequency-Shift Keying (FSK)

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Digital frequency modulation, also referred to as Frequency-Shift Keying (FSK), with binary FSK denoted as 2FSK. This digital modulation technique uses the frequency of a carrier wave to transmit digital messages by controlling the carrier's frequency based on the input data. In 2FSK signals, the symbol "1" corresponds to one carrier frequency, while the symbol "0" corresponds to a different carrier frequency, with instantaneous switching between frequencies. Implementation often involves generating two distinct sinusoidal waveforms and switching between them using digital logic or lookup tables in code.

Detailed Documentation

Digital frequency modulation, also known as Frequency-Shift Keying (FSK), is a technique that uses the frequency of a carrier wave to transmit digital messages. In binary frequency-shift keying, denoted as 2FSK, the digital signal controls the carrier frequency to represent different digital symbols. In 2FSK signals, the symbol "1" corresponds to one carrier frequency, while the symbol "0" corresponds to another distinct carrier frequency, with instantaneous transitions between frequencies. Code implementation typically involves using oscillators or direct digital synthesis (DDS) to generate the two frequencies, with a switching mechanism controlled by the binary input stream. This makes digital frequency modulation an efficient and reliable digital communication technology, commonly implemented in software-defined radio systems using mathematical waveform generation functions.

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