1. The symmetric impulse response having an even number of samples cannot be used to design a band pass, band stop, or high pass filter.
2. In a Hamming window, the side-lobe magnitude remains constant with increasing frequency.
3. For an impulse response to be asymmetric, the condition is h(n) = -h(N-1-n).
1. The symmetric impulse response having an even number of samples cannot be used to design a band pass, band stop, or high pass filter.
2. In a Hamming window, the side-lobe magnitude remains constant with increasing frequency.
3. For an impulse response to be asymmetric, the condition is h(n) = -h(N-1-n).
1. The symmetric impulse response having an even number of samples cannot be used to design a band pass, band stop, or high pass filter.
2. In a Hamming window, the side-lobe magnitude remains constant with increasing frequency.
3. For an impulse response to be asymmetric, the condition is h(n) = -h(N-1-n).
1. The symmetric impulse response having an even number of samples cannot be used to design a band pass, band stop, or high pass filter.
2. In a Hamming window, the side-lobe magnitude remains constant with increasing frequency.
3. For an impulse response to be asymmetric, the condition is h(n) = -h(N-1-n).
6. The zeros of Butterworth filters exist at ___________
(a) left half of s-plane (b) Origin (c) Infinity (d) Right half of s-plane
7. To eliminate multiple images at the output, during interpolation by I, the output is filtered to have a bandwidth of____________ 𝝅 𝐼 𝜋 (a) πI (b) 𝑰 (c) 𝜋 (d) 𝐼2
8. Which of the following are true with respect to quantization of filter coefficients-----------
(a) Shift in location of poles and zeros (b) Deviation of impulse response
(c) Deviation of frequency response (d) all the above
9. Which of the following is false with respect to truncation error?
(a) The truncation error of a positive number is always negative
(b) The truncation error of a negative number in one’s compliment form is always positive
(c) The truncation error of a negative number in sign magnitude form is always negative
(d) The truncation error of a negative number in two’s compliment form is always negative
10. Which of the following is false with respect to limit cycle in a recursive system?
(a) Limit cycles are due to product quantization
(b) During limit cycle, the output is finite or oscillates between finite values
(c) Limit cycle exist even if the input is very much larger than the dead band
(d) During limit cycle, the output is finite even if the input is zero.
11. The ROC of the signal x(n)=an for -5<n<5 is__________ ( b )
a) entire z-plane b) entire z-plane except z=0 and z=ꚙ
c) entire z-plane except z=0 d) entire z-plane except z=ꚙ
12. If Fs is the sampling frequency then the relation between analog frequency F and digital
frequency f is _____ ( c ) 𝐹 Fs 𝐹 2𝐹 a) f= 2Fs b) f= F c) f=Fs d) Fs
13. If DFT {x(n)}=X(k), then DFT{x(n+m)N}= ( c )
−𝑗2𝜋𝑘𝑚 −𝑗2𝜋𝑘 𝑗2𝜋𝑘𝑚 𝑗2𝜋𝑘
a) X(k)e 𝑁 b) X(k)e 𝑚𝑁 c) X(k)e 𝑁 d) X(k)e 𝑚𝑁
14. In N-point DFT of L-point sequence, the value of N to avoid aliasing in frequency Spectrum is________ ( c ) a)N≠L b) N≤L c) N≥L d) N=L
15. The poles of Butterworth transfer function lie_____________ ( a )
a) Symmetrically on a circle in s-plane b) symmetrically on an ellipse in s-plane
c) Anti symmetrically on a circle in s-plane d) Anti symmetrically on an ellipse in s-plane.
16. In type-I Chebyshev approximation the magnitude response is ___________ in the
Pass band and __________ in the stop band. ( c )
a. Equiripple and equiripple b. monotonic and equiripple c. Equiripple and monotonic d.
Monotonic and Monotonic 17) In an N-point sequence, if N=16, the total number of complex additions and multiplications using Radix-2 FFT are____ ( a )
a. 64 and 32 b. 32 and 64 c. 32 and 32 d. 64 and 64
8) The complex valued phase factor/twiddle factor, WN can be represented as (c)
−𝒋𝝅 𝒋𝟐𝝅 −𝒋𝟐𝝅 −𝒋𝝅𝑵
a. 𝒆 𝑵 b. 𝒆 𝑵 c. 𝒆 𝑵 d. 𝒆 𝟐
19.) The Direct form realization of IIR system with M zeros and N poles involves _______Multiplications. (b)
