5.2.2. FPGA-Based FIR Filter Example

Try these first

1. 1.

   What does the 'CLK' signal do in the FIR filter implementation?

   Hint

   Think about its role in timing.

2. 2.

   What is the purpose of coefficients in an FIR filter?

   Hint

   Recall their role in filtering.

3. 3.

   What is the primary function of an FIR filter?

   • To amplify signals
   • To filter noise
   • To compress data

   Hint

   Think about what a filter does.

4. 4.

   True or False: FIR filters can have infinite impulse responses.

   • True
   • False

   Hint

   Recall the definition of FIR.

5. 5.

   Create a VHDL design for a 6-tap FIR filter with coefficients [1, 2, 3, 2, 1] and apply it to an input signal of [1, 1, 1, 1, 1, 1] (length should match coefficients). What will be the output?

   Hint

   Use weighted sums to calculate the output.

6. 6.

   Discuss the potential issues that could arise from using incorrect filter coefficients in an FIR filter. What effects could this have on the output signal?

   Hint

   Consider how each coefficient changes the output.