Cryptography Reference
In-Depth Information
Figure 3.9 - Minimum distances required for 8-PSK modulation and a Gaussian
channel as a function of packet size, for some coding rates and PER =10 7 and
PER
=10 11 .
(relation (3.9)), random codes have a minimum distance of about 1000. There
is therefore a great difference between what ideal (random) coding can offer and
what we really need.
A second aspect concerns the dependency of the required MHD upon the
modulation used, a dependency that turns out to be minimum. Thus, a code
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