ASK Advantages | ASK Disadvantages | Amplitude Shift Keying
This page covers advantages and disadvantages of ASK.ASK stands for Amplitude Shift Keying. Both ASK advantages and ASK disadvantages are covered.
Following are the silent features of ASK modulation.
• ASK is digital modulation technique in which carrier is analog and data to be modulated is digital. Modulated output is analog.
• 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. Voltage levels are left to designers of the modulation system.
Figure-1: ASK Modulation
Refer ASK vs FSK vs PSK >> for difference between ASK, FSK and PSK digital modulation techniques.
Following points summarizes ASK advantages:
➨It offers high bandwidth efficiency.
➨It has simple receiver design.
➨ASK modulation can be used to transmit digital data over optical fiber.
➨ASK modulation and ASK demodulation processes are comparatively inexpensive.
➨Its variant OOK is used at radio frequencies to transmit morse codes.
Following points summarizes ASK disadvantages:
➨It offers lower power efficiency.
➨ASK modulation is very susceptible to noise interference. This is due to the fact that noise affects the amplitude. Hence another alternative modulation technique such as BPSK which is less susceptible to error than ASK is used.