1
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
For a bit-rate of 8 kbps, the best possible values of the transmitted frequencies in a coherent binary FSK system are
A
16 KHz and 20 KHz
B
20 KHz and 32 KHz
C
20 KHz and 40 KHz
D
32 KHz and 40 KHz
2
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through
A
an RC filter
B
an envelope detector
C
a PLL
D
an ideal low-pass filter with the appropriate bandwidth
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
For a given data rate, the bandwidth Bp of a BPSK signal and the band width B0 of the OOK signal are related as
A
Bp = B0/4
B
Bp = B0/2
C
Bp = B0
D
Bp = 2B0
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
In a PCM system with uniform quantization, increasing the number of bits from 8 to 9 will reduce the quantization noise power by a factor of
A
9
B
8
C
4
D
2

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