PLL and AFC Components: NCOs, Loop Filter Design & Implementation

The module synchronization includes many functions and classes focused on:

1. Component classes for implementing NCO’s (32-bit and 48-bit), DSP loop filters (two types), accumulator (used in the loop filters), \(K_p\) and \(K_i\) calculation functions, and several digital PLL analysis functions.

2. Two implementations examples (one PLL and one AFC).

3. To implement the AFC a quadricorrelator/frequency discriminator class for sample-by-sample processing, as is needed for tracking loop simulation/implementation.

• Phase Lock Loops
  • Complex Baseband PLL
• Automatic Frequency Control
  • AFC Tracking Loop