1
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
A signal is sampled at 8 KHz and is quantized using 8-bit uniform quantizer. Assuming $$SN{R_q}$$ for a sinusoidal signal, the correct statement for PCM signal with a bit rate of R is
A
R = 32 kbps, $$SN{R_q}$$ = 25.8 dB
B
R = 64 kbps, $$SN{R_q}$$ = 49.8 dB
C
R = 64 kbps, $$SN{R_q}$$ = 55.8 dB
D
R = 32 kbps, $$SN{R_q}$$ = 49.8 dB
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
If Eb, the energy per bit of a binary digital signal, is 10-5 watt-sec and the one-sided power spectral density of the white noise, N0 = 10-6 W/Hz, then the output SNR of the matched filter is
A
26 dB
B
10 dB
C
20 dB
D
13 dB
3
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
A sinusoidal signal with peak-to-peak amplitude of 1.536V is quantized into 128 levels using a mid-rise uniform quantizer. The quantization-noise power is
A
$$0.768$$
B
$$48 \times {10^{ - 6}}{V^2}$$
C
$$12 \times {10^{ - 6}}{V^2}$$
D
$$3.072 V$$
4
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
Let x(t) be the input to a linear, time-invariant system. The required output is 4x(t-2). The transfer function of the system should be
A
4 e$$j4\pi f$$
B
2 e$$-j8\pi f$$
C
4 e$$-j4\pi f$$
D
2 e$$j8\pi f$$
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