DCN5511: Data Communication and Networking - Frame Rate - Frame Size in Bit - IT Assignment Help

Assignment Task:

Questions: 
1. Draw a 16-QAM constellation diagram with two different peak amplitude values, 4 and 6, at four different phases and data points with (2, 2), (-2, 2), (-2, -2), (2, -2), (4, 4), (-4, 4), (-4, -4) and (4, -4).

2. 6 sources, 4 with a bit rate of 160 kbps and 2 with a bit rate of 320 kbps, are combined using multiple slot TDM with one synchronizing bits. Assume 2 bits are taken from the first 4 sources and 4 bits from the second 2 sources. Answer the following questions:

i. What is the size of a frame in bits?
ii. What is the frame rate?
iii. What is the duration of a frame?
iv. What is the data rate? Write your answer in Mbps.

3. Briefly explain the structure of coaxial cable with its diagram.

Coaxial cable is a type of cable that has an inner conductor surrounded by an insulating layer, surrounded by a conductive shielding. Many also have an insulating outer jacket The diagram below illustrates the construction of a typical cable. Electrical signal flows through the centre conductor.

4. Construct the Hamming code for the bit sequence 01001.

5. Draw a Stop-and-Wait ARQ diagram based on the following scenario:
 
a) Frame 0 is sent and acknowledged. 
b) Frame 1 is sent but lost. 
c) Frame 1 is resent after a time-out, and acknowledged. 
d) Frame 0 is sent and acknowledged is delayed. 
e) Frame 0 is resent after the time-out and acknowledged, but the frame is discarded with expecting Frame 1 and acknowledgement has been discarded too. 
f) Frame 1 is sent and acknowledged after received the delayed acknowledgement.

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