Altera Viterbi Compiler - Manual (Page 21)

Figure 3-3: Mapping of Coded Bits and Sector Numbers
The specific mapping is not important. You can derive other mappings by permutating subsets in a way
that preserves the main property of increased minimum distance among the subsets. However, you can
create any other mapping, including symbol mappings for 8-PSK, 16-PSK and others.
011
001
000
110
111
101
100
010
0
1 2
3
4
5 6
7
If you create another mapping, you must correctly connect the branch metrics created outside the IP core
to the input ports and correctly configure the polynomials GA and GB for the trellis generation.
UG-VITERBI
2014.12.15
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Viterbi IP Core Functional Description Altera Corporation
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