PCM-and-DM-modulators

A Python/MATLAB project which implements pulse-code modulation (PCM) and delta modulation (DM).

This project was assigned for the Communication Engineering (EE 374) course in the Spring 2022 semester. For reference, check out the instructor of this course, Ali E. Pusane's implementation of delta modulation (DM) in Python.

Run on Terminal

matlab -nodisplay -nosplash -nodesktop -r "run('main.m');exit;"

Description

Consider the message signal m(t) = −cos(200πt) + sin(50πt).

• Task 1: Pulse Code Modulation: Consider the message signal m(t) for the time interval (0,2) seconds. Obtain the pulse code modulated binary sequence if the signal is sampled at the Nyquist sample rate and L=128 quantization levels are used. You can start labeling the quantization labels from the top. The first sample is taken at t=Ts. Your code should display the binary representation of the first 10 samples on the screen, in the format “0110011-1010010-... ”.
• Task 2: Delta Modulation: Consider the message signal m(t) for the time interval (0,2) seconds. Obtain the delta modulated binary sequence if the signal is sampled at four times the Nyquist sample rate. The first sample is taken at t=Ts. Your code should display the binary representation of the first 20 samples on the screen.

Figures

Delta Modulation (DM)

Python

MATLAB

Author

👤 Aras Güngöre

• LinkedIn: @arasgungore
• GitHub: @arasgungore