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PDFAmplitude-Shift Keying (ASK) refers to a type of digital modulation which assigns bit values (high/low) to discrete amplitude levels of an analog wave. ASK is achieved by modulating a carrier sine wave with a digital bit stream which results in a modulated carrier that is able to transmit digital data via variations of its amplitude. ASK does not affect the frequency or phase of the carrier wave.
Amplitude-Shift Keying is one of many digital modulation schemes, each with multiple off-shoots. Other popular methods include Frequency-Shift Keying, Phase-Shift Keying and its off-shoot Minimum-Shift Keying. All digital modulation schemes deal with the efficient transmission of digital data over a medium.
Additional Information:
Amplitude-Shift Keying, Frequency-Shift Keying, and Phase-Shift Keying
Wikipedia.com: Amplitude-Shift Keying
Refer to the RF & Communications Resources page for additional information about RF terminology, fundamentals, and National Instruments RF products.
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