Energy per bit (Eb):
For transmission of binary ‘1'
We know that all periodic signals are power signals. Now we’ll find the energy of ASK for the transmission of binary ‘1’.
**where Ac is the amplitude of the carrier signal
fc is the carrier frequency in Hz
To save transmitter energy, Eb should be small.
In constellation diagram the function whose energy is equal to 1 is said to be a normalized function.
In the above figure the reference axes corresponds to normalized functions.
High-order Amplitude Shift Keying (ASK) refers to using a large number of amplitude levels to represent digital data. For instance, in binary ASK (BASK), there are two amplitude levels, usually represented as 0 and 1. High-order ASK can have more than two amplitude levels, such as 4, 8, 16, 64, etc.
**where Ac is the amplitude of the carrier signal
fc is the carrier frequency in Hz
To save transmitter energy, Eb should be small.
For transmission of binary ‘0’
Constellation Diagram
In constellation diagram the function whose energy is equal to 1 is said to be a normalized function.
In the above figure the reference axes corresponds to normalized functions.
High-order Amplitude Shift Keying (ASK) refers to using a large number of amplitude levels to represent digital data. For instance, in binary ASK (BASK), there are two amplitude levels, usually represented as 0 and 1. High-order ASK can have more than two amplitude levels, such as 4, 8, 16, 64, etc.
MATLAB Code For Constellation Diagram of ASK
Output
Effect of Noise on Constellation Diagram of ASK
At SNR = 5 dB