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Unformatted text preview: It is easily seen that a bitwise multiplication of any two rows produces 0. For
example, row 3 multiplied by row 4 equals 1 + (–1) + 1 + (–1) + 1 + (–1) + 1 + (–1) =
0.
7.14 a. 8
b. –8
c.
A output (data = 1)
B output (data = 1)
Received
Receiver codeword
Multiplication
d.
A output (data = 0)
B output (data = 1)
Received
Receiver codeword
Multiplication
e.
A output (data = 1)
B output (data = 0)
Received
Receiver codeword
Multiplication
f.
A output (data = 0)
B output (data = 0)
Received
Receiver codeword
Multiplication
g.
A output (data = 1)
B output (data = 1)
Received
Receiver codeword
Multiplication
h.
A output (data = 0)
B output (data = 1)
Received
Receiver codeword
Multiplication
Source: [WEBB00] –1
–1
–2
–1
2 1
–1
0
1
0 –1
1
0
–1
0 1
1
2
1
2 –1
–1
–2
–1
2 1
–1
0
1
0 –1
1
0
–1
0 1
1
2
1
2 =8 1
–1
0
–1
0 –1
–1
–2
1
–2 1
1
2
–1
–2 –1
1
0
1
0 1
–1
0
–1
0 –1
–1
–2
1
–2 1
1
2
–1
–2 –1
1
0
1
0 =–8 –1
1
0
–1
0 1
1
2
1
2 –1
–1
–2
–1
2 1
–1
0
1
0 –1
1
0
–1
0 1
1
2
1
2 –1
–1
–2
–1
2 1
–1
0
1
0 =8 1
1
2
–1
–2 –1
1
0
1
0 1
–1
0
–1
0 –1
–1
–2
1
–2 1
1
2
–1
–2 –1
1
0
1
0 1
–1
0
–1
0 –1
–1
–2
1
–2 =–8 –1
–2
–3
–1
3 1
–2
–1
1
–1 –1
2
1
–1
–1 1
2
3
1
3 –1
–2
–3
–1
3 1
–2
–1
1
–1 –1
2
1
–1
–1 1
2
3
1
3 =8 1
–2
–1
–1
1 –1
–2
–2
1
–2 1
2
2
–1
–2 –1
2
1
1
1 1
–2
–1
–1
1 –1
–2
–3
1
–3 1
2
3
–1
–3 –1
2
–1
1
–1 =–8 33 ...
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This note was uploaded on 02/20/2012 for the course ENC 3250 taught by Professor Dr.timothycerner during the Fall '11 term at UNF.
 Fall '11
 Dr.TimothyCerner

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