this .rar file is dedecated to the beginers in the communications and digital signal processing fileds :

1. simple amplitude modulation

2. Disictete Fourier Transform

3. plotting the digital symbols

4. Digital Data Representation

5. Digital Symbol Representation

6. FreqDomPlotSquareSignl

7. plot sin in frequency and time domains (you can see the frequency)

8. RepresentingSignalAnalogue

9. SigRepAnlgModula

10. example to plot a 2 kbps signal