Here strength or amplitude of carrier signal is varied to represent binary 1 and binary 0 data inputs While frequency and phase of the carrier signal remain constant.ASK is digital modulation technique in which carrier is analog and data to be modulated is digital.Both ASK advantages and ASK disadvantages are covered.įollowing are the silent features of ASK modulation. This page covers advantages and disadvantages of ASK.ASK stands for Amplitude Shift Keying. The variants of basic PSK and ASK modulations are QAM, 16-QAM, 64-QAM and so on.Īdvantages and Disadvantages of ASK, FSK and PSKĪSK Advantages | ASK Disadvantages | Amplitude Shift Keying.PSK modulation is widely used in wireless transmission.It is a power efficient system but it has lower bandwidth efficiency.In case of PSK probability of error is less.In PSK modulation, NRZ signaling is used. If s(t) = A*cos(2*π*fc*t) for Binary 1 than As shown in the figure, Binary 1 is represented by 180 degree phase of the carrier and binary 0 is represented by 0 degree phase of the RF carrier.īinary PSK can be represented by following equation : Figure depicts Binary Phase Shift Keying modulation type of PSK. It is digital modulation technique where in phase of the RF carrier is changed based on digital input. The short form of Phase Shift Keying is referred as PSK. In MFSK (Multiple FSK), more than one bits are represented by each signal elements. In order to overcome drawbacks of BFSK (Two level Binary FSK), multiple FSK modulation techniques with more than two frequencies have been developed.
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