Skip to content

Qvapil/2021-Digital-Communications-I

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

7 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

2021-Digital-Communications-I

ASK, QAM, PSK, FSK, MSK simulations and analysis.

Lab exercises for Digital Communications I course, 6th Semester 2021 of the Electrical and Computer Engineering School at the National Technical University of Athens.

In this course I used MATLAB to simulate transmitter-channel-receiver systems using various modulation techniques, and compare their spectrum and bit error rate.

Lab 1: FFT

I created my own version of the pwelch function. Screenshot (1839)

Lab 2: Filters

I created orthogonal, Hamming, Kaiser and Parks-McClellan filters and compared them. Screenshot (1841) Screenshot (1842) Screenshot (1843) Screenshot (1862)

Lab 3: ASK

ASK modulation.

Screenshot (1845) Screenshot (1846)

Lab 4: Nyquist filters

ASK modulation using Nyquist filters. Comparison of different roll-off factors and filter order. Screenshot (1848) Screenshot (1849) Screenshot (1850)

Lab 5: PSK and QAM

PSK and QAM modulation.

Screenshot (1851) Screenshot (1852) Screenshot (1853) Screenshot (1854)

Lab 6: FSK and MSK

Coherent and non coherent FSK modulation. MSK modulation and comparison of various systems. Screenshot (1857) Screenshot (1858) Screenshot (1859) Screenshot (1860) Screenshot (1861)