What you will learn

  • Software: fairly simple constructs
  • Domain: Modulation, FSK, tradeoffs

Amplitude Modulation

  • Construct a carrier (high frequency) and a signal, represented as a list of values
  • Simply add the two
  • Visualize all the three signals
  • Take the modulated signal and subtract out the carrier to
    recover the original signal

Frequency Modulation – 1

  • Let’s start with a binary data signal.
  • Based on the frequency of your carrier, determine
    an appropriate $ \Delta_f $
  • Modify the carrier frequency for a range of cycles based on
    the input signal
  • Plot all three signals
  • Recover the input signal

Frequency Modulation – 2

  • Rather than a $f_c \pm \Delta_f$ for a $1$ and $0$, use a return-to-zero scheme. So the frequency changes only if there is a change
    from zero to one or vice-versa.
  • Plot all three signals
  • Recover the input signal

Frequency Modulation – 3

  • You could group your input data by two bits (so four levels) and use correspondingly more $\Delta_f$
  • Plot all three signals
  • Recover the input signal
Follow by Email
Facebook
Twitter
LinkedIn

1 Comment

  1. Pingback: Programming for the Electronics Engineering Student – Shrirang Karandikar

Leave a comment

Your email address will not be published. Required fields are marked *

Search

  • Search

  • Categories

  • Post Date