Question

HOW MODULATION Effecs the exchange of SNR with Bandwidth

Answer #1

Task 1(Mathematical):
Calculate the Shannon theoretical capacity of a channel whose
bandwidth is 5MHz with the following SNR in dB:
1.) 0 dB 2.) 10dB 3.) 55dB 4.) 35dB 5.) 60dB
(please pay attention to this fact that in Shannon calculation,
SNR has to be in absolute units).
Calculate the Nyquist capacity of a channel whose bandwidth is
5MHz with the following logical levels:
1.) 8 2.) 16 3.) 64 4.) 256 5.) 1024

What is the typical range of AM modulation index (depth)? What
will happen if it is at the lowest value or highest value in the
range? What will happen if it goes beyond the range? too low a
level of modulation and the modulation does not utilize the carrier
efficiently - too high and the carrier can become over modulated
causing sidebands to extend out beyond the allowed bandwidth
causing interference to other users.

How
to find the bandwidth of Gaussian function

Compair between delta modulation and adaptive delta modulation

1.
The SNR has a more prevalent effect on the channel capacity than
the channel bandwidth (T or F)
2. What do we replace a sequence of 8 0's wirh in a bipolar
line of code (10 Words or less)
3. Given a host address 138.168.67.22/21
Does the host belong to a subnet or a supernet
What is the associated maak
What is the network IP address
What is the broadcast address
What is rhe address of the last host...

How to compute output power, gain and bandwidth?

Answer All
Please read and answer the following questions
Assignment 2
Text Book: B. Sklar “Digital Communication Fundamental and
Applications”
Chapter 2: Formatting and Baseband Modulation
Questions
1. What is the similarities and differences between the terms
“formatting ” and “source coding”
2. In using PCM for digitizing analog information, explain how the
parameters fidelity, bandwidth, and time delay can be traded
off.
3. Why is it often preferred to use units of normalized bandwidth,
WT (or time –bandwidth product),...

Q14: For the binary sequence in Q13, sketch the resulting
waveforms from
sinusoidal modulation if the modulation type: ASK, BPSK, FSK,
QAM, QPSK,
QFSK.
Q15: A modulating signal ?(?) bandlimited to 4 kHz is sampled at
a rate of 10.000
samples/sec. The samples are quantized into 256 levels, binary
coded (unipolar
NRZ) and transmitted over a channel with ?? (?) = 6.25*10-5
watt/Hz. Each
received pulse has energy 2O 10-5 Given that ?? = 1 and ?
2(?)
̅̅̅̅̅̅̅.
a-Find...

. For high - level modulation and low - level modulation, what
kinds of different amplifiers do they use? And what are the
features of those amplifiers power transmission ?

Determine the amplitude modulation ratio and frequency
modulation ratio of a unipolar
PWM switching Inverter. The triangle waveform has peak-to-peak
voltage of 2 volts at a
frequency of 25 kHz and the control waveform is v(t) = 0.85 sin
377t.

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