Wireless Communication: Encoding, Multiplexing, and Wi-Fi Network Design

WIRELESS COMMUNICATION
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Part I: Encoding and error control
a) Calculate the data rate required for robot to remote controller communication
Data rate= number of bits sent/ second
Total number of bits send = 16
Time= 2seconds
16/2
8mbs
b) Explain 3 types of suitable encoding techniques could be used to encode the status
string.
i. Bipolar AMI encoding: a no line signal represent a zero and a one is represented
by positives and negatives. In this technique, there is no loss of synchronization
with a long string ones (Maeda, 2014)
ii. Manchester encoding: there is a transition at the middle of one bit. low to high
represent a one while high to low shows a zero. The transition serves as a clock
and data. This encoding is used in 10Mbps Ethernet (Amiri & Ali, 2013)
iii. Pseudo-ternary encoding: One is represented by the absence of a line signal. An
alternating negative and positive indicates zero. There is no loss of
synchronization with a long string of zeros.
c)
i. Write the status string in binary for this instance
Convert all the parameters to a binary
5m/s = 0101
48cm = 110000
Motor functionality = 1111
75%= 0.11
Combine all the binary to form one string

0101110000111111
ii. Represent the status string on ASK, FSK, and PSK encoding techniques
FSK
ASK
PSK

d) Calculate the CRC for the status string derived in c) with polynomial divisor
11001101
Dividend= 0101110000111111
Divisor = 11001101
Step 1
Add additional digits to the dividend
= divisor no -1
= 8-1
= 7 units.
Step 2
Add additional digits to the data word to form the argument data word
= 01011100001111110000000