3. What is the signal to noise ratio, if: a) the received signal power is 0.02 m and the noise power is 500 ni? b) a 10w transmitter sends a signal that attenuates 50% by the time it arrives at the receiver and the noise level at the receiver is 700,000 ul?
3. What is the signal to noise ratio, if: a) the received signal power is 0.02 m and the noise power is 500 ni? b) a 10w transmitter sends a signal that attenuates 50% by the time it arrives at the receiver and the noise level at the receiver is 700,000 ul?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Transcribed Image Text:8. What is the signal to noise ratio, if:
a) the received signal power is 0.02 ml and the noise power is 500 nw?
b) a 10w transmitter sends a signal that attenuates 50% by the time it
arrives at the receiver and the noise level at the receiver is 700,000 uw?
Expert Solution
Step 1
As we know that signal to noise ratio is expressed in dB.
And it is written as
(S/N)dB = 10log((signal power)/(Noise power))
(a) here,
Signal power = 0.02 mw = 2×10-5 w
Noise power = 500 nw = 5×10-7 w
Now
(S/N)dB = 10log((2×10-5)/(5×10-7))
= 10log(40)
= 16.02 dB
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