1
GATE ECE 2016 Set 3
Numerical
+1
-0
An analog baseband signal, band limited to 100 Hz, is sampled at the Nyquist rate. The samples are quantized into four message symbols that occur independently with probabilities $${p_1}$$ = $${p_4}$$ = 0.125 and $${p_2}$$ =$${p_3}$$. The information rate (bits/sec) of the message source is ____________________
Your input ____
2
GATE ECE 2012
MCQ (Single Correct Answer)
+1
-0.3
A source alphabet consists of N symbols with the probability of the first two symbols being the same. A source encoder increases the probability of the first symbol by a small amount $$\varepsilon $$ and decreases that of the second by $$\varepsilon $$. After encoding, the entropy of the source
A
increases
B
remains the same
C
increases only if N = 2
D
decreases
3
GATE ECE 2012
MCQ (Single Correct Answer)
+1
-0.3
In a base band communications link, frequencies up to 3500 Hz are used for signaling. Using a raised cosine pulse with 75% excess bandwidth and for no inter-symbol interference, the maximum possible signaling rate in symbols per second is
A
1750
B
2625
C
4000
D
5250
4
GATE ECE 2011
MCQ (Single Correct Answer)
+1
-0.3
An analog signal is band-limited to 4kHz. sampled at the Nyquist rate and the samples are quantized into 4 levels. The quantized levels are assumed to be independent and equally probable, bit rate is
A
1 bit/sec
B
2 bits/sec
C
3 bits/sec
D
4 bits/sec
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