WorksheetsSolamaten ena pannuva
Total questions: 10
Worksheet time: 10mins
Telegraph signals are examples of
Digital signal
analog signal
impulse signal
pulse train
The speech signal is obtained after
Analog to digital conversion
Digital to analog conversion
Modulation
Quantization
The interface between an analog signal and a digital processor is
D/A converter
A/D converter
Modulator
Demodulator
As compared to the analog systems, the digital processing of signals allow
1) Programmable operations
2) Flexibility in the system design
3) Cheaper systems
4) More reliability
1, 2 and 3 are correct
1 and 2 are correct
1, 2 and 4 are correct
All the four are correct
Roll-off factor is
The bandwidth occupied beyond the Nyquist Bandwidth of the filter
The performance of the filter or device
Aliasing effect
None of the above
The discrete impulse function is defined by
a. δ(n) = 1, n ≥ 0
= 0, n ≠ 1
b. δ(n) = 1, n = 0
= 0, n ≠ 1
c. δ(n) = 1, n ≤ 0
= 0, n ≠ 1
d. δ(n) = 1, n ≤ 0
= 0, n ≥ 1
DTFT is the representation of
a. Periodic Discrete time signals
b. Aperiodic Discrete time signals
c. Aperiodic continuous signals
d. Periodic continuous signals
The transforming relations performed by DTFT are
1) Linearity
2) Modulation
3) Shifting
4) Convolution
a. 1, 2 and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct
Frequency selectivity characteristics of DFT refers to
a. Ability to resolve different frequency components from input signal
b. Ability to translate into frequency domain
c. Ability to convert into discrete signal
d. None of the above
The computational procedure for Decimation in frequency algorithm takes
a. Log2 N stages
b. 2Log2 N stages
c. Log2 N2 stages
d. Log2 N/2 stages
Log2 N2 stages
2Log2 N stages
Log2 N stages
Log2 N/2 stages
