Different between ASK ,FSK and PSK

ParametersASKFSKPSK
Variable characteristicsAmplitudeFrequencyPhase
BandwidthIs proportional to signal rate (B =(1+d)S),d is due to modulation & filtering ,lies between 0 & 1.B=(1+d)×S+2ΔfB=(1+d)×S
Noise immunitylowHighHigh
ComplexitySimpleModerately complexVery complex
Error probabilityHighLowLow
Performance in presence of noisePoorBetter than ASKBetter than FSK
Bit rate

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