Frequency Shift Keying

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(communications)

Frequency Shift Keying - (FSK) The use of frequency modulation to transmit digital data, i.e. two different carrier frequencies are used to represent zero and one.

FSK was originally used to transmit teleprinter messages by radio (RTTY) but can be used for most other types of radio and land-line digital telegraphy. More than two frequencies can be used to increase transmission rates.

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No references found			Digital modulation techniques are applied to optical communications systems and networks, in areas such as binary and quadrature amplitude shift keying, phase shift keying, differential shift keying, continuous phase shift keying, frequency shift keying, multilevel modulation, and multi-subcarriers. Digital optical communications by SciTech Book News The PHY uses 2-or 4-level Gaussian frequency shift keying (GFSK) modulation. Understanding IEEE 802.11 by Champness, Angela / Communications News Dynamic DR works by enabling the radios at both the transmitting and receiving ends to dynamically switch modes to adapt to the interference level of the environment - bouncing from Cypress's patented, frequency-agile Direct Sequence Spread Spectrum (DSSS) technology to a Gaussian Frequency Shift Keying (GFSK) mode. Cypress Upgrades Industry's Most Robust Wireless Solution for Crowded ... by Business Wire			frequency mixing Frequency Modulation frequency modulation-frequency modulation frequency modulation-phase modulation frequency modulator frequency monitor frequency multiplexing Frequency Multiplier frequency offset frequency optimum traffic frequency polygon frequency prediction chart frequency probabilities Frequency Pulling frequency range frequency recorder frequency regulator frequency relay frequency response frequency run frequency scan antenna frequency scanning frequency separation multiplier frequency separator frequency shift Frequency Shift Keying frequency spectrum frequency splitting frequency stability Frequency Stabilization frequency standard Frequency Standard, Primary Frequency Standard, Secondary frequency study frequency swing Frequency Synthesizer frequency table frequency telemetering frequency theory frequency tolerance frequency transformation frequency translation frequency translator frequency variation Frequency, Electrical frequency-azimuth intensity frequency-changer station Frequency-Contrast Response Curve frequency-dependent selection frequency-division data link frequency-division multiple access			Frequency Response Function Frequency Response Phase-Shift Oscillator Frequency Reuse Pattern frequency run Frequency Scaled Modal Assurance Criterion Frequency Scaling Factor frequency scan antenna Frequency Scan Radar Frequency Scanned Array Radar frequency scanning Frequency Select Frequency Select 0 Frequency Select Receiver Frequency Selective Channel Frequency Selective Damping Frequency selective fading Frequency Selective Fading Channel Frequency Selective Receiver System Frequency Selective Surface Frequency Selector Control Frequency Sensitive Competitive Learning frequency separation multiplier frequency separator Frequency shift Frequency shift Frequency shift Frequency Shift Keying Frequency Shift Keying/Intensity Modulation Frequency Shift Modulation Frequency Shift Offset Quadrature Frequency space Frequency Space-Mapped Neuromodeling Frequency Space-Mapping Super Model Frequency spectrum Frequency spectrum Frequency Spectrum Management System frequency splitting Frequency stability frequency stabilization Frequency standard Frequency Standard, Primary Frequency Standard, Secondary frequency study Frequency Sub Carrier Frequency Sub-Band Frequency Surveillance System frequency swing Frequency Synchronizer Based on Channel Statistics Frequency synthesis Frequency Synthesiser Frequency synthesizer Frequency Synthesizer Unit

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