Compositing of the information block

PRACTICAL SEMINARS

Cyclic code combination synthesis

Objective: To learn the separable code combination algorithm using the cyclic code construction.

Task to the practical seminar:

1. To learn items 1.2.1 – 1.2.2 of this teaching manual.

2. To composite the information block, which consists of student’s surname and name initials.

3. To calculate key parameters of a cyclic code according to the variant.

4. To synthesise a code combination of the CC according to the calculated parameters.

5. To check up correctness of reception code combination in the binary form.

Initial data:

Parameter	Penultimate figure of the credit book number
р er	2×10^-3	5×10^-4	1×10^-3	7×10^-5	3,7×10^-3	4×10^-4	2×10^-5	2,5×10^-4	1×10^-4	3,5×10^-4
d 0
Parameter	Last figure of the credit book number
a	0,55	0,6	0,4	0,65	0,45	0,7	0,47	0,62	0,5	0,52
Р un er (1*10^-6)	1,0	0,5	0,7	0,8	0,9	0,8	0,7	0,6	0,5	0,4

Compositing of the information block

For compositing it is necessary to use a fragment of the code table of primary ASCII code which is presented in fig. 2.1. The four senior bits are read out from lines, and four younger – from columns corresponding to a site of the letter.

Numbers of categories	English alphabet letters
b 8	b 7	b 6	b 5	b 4	b 3	b 2	b 1
							P
				A		Q
				B		R
				C		S
				D		T
				E		U
				F		V
				G		W
				H		X
				I		Y
				J		Z
				K
				L
				M
				N
				O

Figure 2.1 – ASCII Code. A fragment of the English alphabet

For example, Sidorov Ivan's initials are:

S 1100 0 0100 0011;

I 1 0011 1001.

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