Question

Baseband transmission of a digital signal is possible only if we have a ________ channel

a) low-pass

b) bandpass

c) low rate

d) high rate

Answer #1

Baseband transmission of a digital signal is possible only if we
have a **low
pass** channel

**The correct option is a**.

a) **low-pass**

**Explanation**

Baseband transmission of a digital signal that preserves the
shape of the digital signal is possible only if we have a
**low**-**pass channel** with an infinite
or very wide bandwidth

b) **Bandpass**

If the available channel is bandpass, we cannot send the digital signal directly to the channel, it must be converted to an analog form before transmission.

c) low rate: low rate channel doesn;t make any sense in this problem.

d) high rate: Baseband transmission of a digital signal is possible only if we have a high rate channel because high rate show the data rate.

A baseband communication system has a distribution channel and
power spectra density of white noise ?/2 of 10-8 W/Hz. The signal
transmitted has a 5 k? bandwidth. If an RC low-pass filter with a 3
dB bandwidth of 10 kHz is used at the receiving end to limit noise
power, determine the output noise power
I dont know why answer is 628.3um???

Television channels are 6 MHz wide. How many bits/sec can be
sent if four-level digital signals
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&
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There is a chance that a bit transmitted through a digital
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probability distribution below,
x
0
1
2
3
P(X=x)
0.656
0.292
0.049
0.003
Find
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x < 0
0 ? x < 1
1 ? x < 2
2 ? x...

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filter should you design for this application?
A. Bandpass
B. Lowpass
C. Highpass
D. Bandstop
For the same problem, what is the transition bandwidth parameter
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Communication deals with the principle of transferring
information from
one place to ____________.
a)
Same
b)
Various
c)
Another
d)
different
2.
It involves transmission and reception, and processing of -
________between these two locations.
a) different
b) various
c) same
d) various
3.
The source could be in continuous form as in the case of
analog
communication and as discrete signals as in the case of
digital
communication.
a) True
b) False
4.
_________ distance transmission of information is...

Q1. A multilevel digital communication system is to operate at a
baud rate of 20Kbaud/s. Each
level is encoded as an 8 bit digital word for the multi level
transmission. The message signal to be
transmitted is an analog signal which is PCM encoded with an 8
level quantizer.
a. What would be the minimum required bandwidth for the multi level
transmission?
b. What would be the sampling rate of the PCM system ?
c. What would be the data...

A waveform, x(t)=10cos(100 πt+π/3)+20cos(200 πt+π/6) is to be
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(a) What is the maximum allowed time interval between sample values
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(b) Draw the discrete time signal obtained and frequency
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(c) If we want to reproduce one hour of this waveform, how many
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In this problem, we study a simple noisy communication channel.
Suppose that X is a binary signal that takes value −1 and 1 with
equal probability. This signal X is sent through a noisy
communication channel, and the medium of transmission adds an
independent noise term. More precisely, the received signal is
Y=X+N, where N is standard normal, indpendendent of X.
The decoder receives the value y of Y, and decides whether X was
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We have a 16 bit analog to digital converter that is expected to
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1. Light travels in vacuum at a higher speed than radio waves do
on Earth.
a. True
b. False
2. What is the Gain (dB) of a transmission if the Maximum Data
Rate is 1 Gbps and the Bandwidth =7000 MHz?
a. 5.675 dB
b. 11.072 dB
c. 12.934 dB
d. 15.420 dB
3. Which factor is the most important for data rate in a
transmission where the bandwidth can't be changed?
a. Gain
b. Signal
c. Noise
d. Log2...

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