1
GATE ECE 2005
MCQ (Single Correct Answer)
+2
-0.6
Noise with uniform power spectral density of N0 W/Hz is passed through a filter H(ω ) = 2exp (-jωtd) followed by an ideal low pass filter of bandwidth B Hz. The output noise power in Watts is
A
2N0B
B
4 N0B
C
8N0B
D
16N0B
2
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 1 mW video signal having a bandwidth of 100 MHz is transmitted to a receiver through a cable that has 40 dB loss. If the effective one-sided noise spectral density at the receiver is 10-20 Watt/Hz, then the signal-to-noise ratio at the receiver is
A
50 dB
B
30 dB
C
40 dB
D
60 dB
3
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
If the variance $$\sigma _d^2$$ of d(n) = x(n - 1) is one-tenth the variance $$\sigma _x^2$$ of a stationary zero-mean discrete-time signal x(n), then the normalized autocorrelation function $${R_{xx}}\,(k)\,/\,\,\sigma _x^2\,at\,\,k\,\, = \,1$$ is
A
0.95
B
0.90
C
0.10
D
0.05
4
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
For a random variable 'X' following the probability density function, p (x), shown in figure, the mean and the variance are, respectively. GATE ECE 1992 Communications - Random Signals and Noise Question 13 English
A
1/2 and 2/3
B
1 and 4/3
C
1 and 2/3
D
2 and 4/3
GATE ECE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12