Amplitude Shift Keying Modulation Technique

This MATLAB code simulates the modulation and demodulation of a binary signal using Amplitude Shift Keying (ASK), specifically Binary ASK

1. Generate Binary Data:

• Randomly generates a binary data sequence of length 10.

1. Plot Binary Signal:

• Plots the generated binary signal using a stem plot.

1. Digital Signal Representation:

• Converts the binary data into a digital signal with a specified number of samples per bit (nb).

1. Plot Digital Signal:

• Plots the digital signal.

1. Carrier Signal:

• Defines a carrier signal as a cosine wave with a frequency (fc) that is related to the bit period (bp).

1. Plot Carrier Signal:

• Plots the carrier signal.

1. ASK Modulation:

• Modulates the digital signal onto the carrier using Amplitude Shift Keying (ASK).
• If the binary data is 1, it uses a high amplitude (A1), otherwise, it uses a low amplitude (A2).

1. Plot ASK Modulated Signal:

• Plots the ASK modulated signal.

1. BASK Modulation:

• Modulates the binary signal onto the carrier using Binary Amplitude Shift Keying (BASK).
• If the binary data is 1, it uses a high amplitude (A1), otherwise, it uses a zero amplitude (A3).

1. Plot BASK Modulated Signal:

• Plots the BASK modulated signal.

1. Demodulation - ASK with Comparator:

• Demodulates the ASK modulated signal using a comparator.
• It compares each segment of the modulated signal with a threshold, and if the maximum value in the segment is greater than the threshold, it demodulates a 1; otherwise, it demodulates a 0.

1. Plot Demodulated Signal:

• Plots the demodulated signal using a stem plot.