Digital Signal Processing Multiple Choice Questions and Answers

1 What is the output of the single stage lattice filter if x(n) is the input?

A x(n)+Kx(n+1)

B x(n)+Kx(n-1)

C x(n)+Kx(n-1)+Kx(n+1)

D Kx(n-1)

Answer:x(n)+Kx(n-1)

2 What is the output from the second stage lattice filter when two single stage lattice filers are cascaded with an input of x(n)?

A K₁K₂x(n-1)+K₂x(n-2)

B x(n)+K₁x(n-1)

C x(n)+K₁K₂x(n-1)+K₂x(n-2)

D x(n)+K₁(1+K₂)x(n-1)+K₂x(n-2)

View Answer

Answer:x(n)+K₁(1+K₂)x(n-1)+K₂x(n-2)

3 What is the value of the coefficient α₂(1) in the case of FIR filter represented in direct form structure with m=2 in terms of K₁ and K₂?

A K₁(K₂)

B K₁(1-K₂)

C K₁(1+K₂)

D None of the mentioned

View Answer

Answer:K₁(1+K₂)

4 The constants K₁ and K₂ of the lattice structure are called as reflection coefficients.

A True

B False

View Answer

Answer:True

5 If a three stage lattice filter with coefficients K₁=1/4, K₂=1/2 K₃=1/3, then what are the FIR filter coefficients for the direct form structure?

A (1,8/24,5/8,1/3)

B (1,5/8,13/24,1/3)

C (1/4,13/24,5/8,1/3)

D (1,13/24,5/8,1/3)

View Answer

Answer:(1,13/24,5/8,1/3)

6 What are the lattice coefficients corresponding to the FIR filter with system function H(z)= 1+(13/24)z^-1+(5/8)z^-2+(1/3)z^-3?

A (1/2,1/4,1/3)

B (1,1/2,1/3)

C (1/4,1/2,1/3)

D None of the mentioned

View Answer

Answer:(1/4,1/2,1/3)

7 If M and N are the orders of numerator and denominator of rational system function respectively, then how many multiplications are required in direct form-I realization of that IIR filter?

A M+N-1

B M+N

C M+N+1

D M+N+2

View Answer

Answer:M+N+1

8 If M and N are the orders of numerator and denominator of rational system function respectively, then how many additions are required in direct form-I realization of that IIR filter?

A M+N-1

B M+N

C M+N+1

D M+N+2

View Answer

Answer:M+N

9 If M and N are the orders of numerator and denominator of rational system function respectively, then how many memory locations are required in direct form-I realization of that IIR filter?

A M+N+1

B M+N

C M+N-1

D M+N-2

View Answer