# Principles of Communications

- [Overviews](/university-notes/principles-of-communications/overviews.md)
- [PCM](/university-notes/principles-of-communications/pcm.md)
- [HDB3](/university-notes/principles-of-communications/hdb3.md)
- [Modulations](/university-notes/principles-of-communications/modulations.md)
- [Cyclic code](/university-notes/principles-of-communications/cyclic_code.md)