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Included error correction on P25 TDULC.

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Added a new "heuristics" module for P25 that improves the estimation of the symbol (dibit) that corresponds to a given analog signal value.
Added a BER (bit error reate) estimation for P25.
This commit is contained in:
EdFuentetaja
2014-05-11 02:23:24 +08:00
parent b45e563e54
commit 9d0fe07931
30 changed files with 2976 additions and 828 deletions
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23
Hamming.cpp
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@@ -1,5 +1,5 @@
#include <Hamming.hpp>
#include "Hamming.hpp"
// definition outside class declaration
Hamming_10_6_3_data Hamming_10_6_3::data;
@@ -50,6 +50,18 @@ int Hamming_10_6_3::decode(std::bitset<10>& input)
return error_count;
}
int Hamming_10_6_3::encode(std::bitset<6>& input)
{
// Compute syndromes
int s0 = ((data.gt0 & input).count() & 1) << 3;
int s1 = ((data.gt1 & input).count() & 1) << 2;
int s2 = ((data.gt2 & input).count() & 1) << 1;
int s3 = ((data.gt3 & input).count() & 1);
int parity = s0 | s1 | s2 | s3;
return parity;
}
int Hamming_10_6_3_TableImpl::decode(int input, int* output)
{
assert (input < 1024 && input >= 0);
@@ -60,3 +72,12 @@ int Hamming_10_6_3_TableImpl::decode(int input, int* output)
return data.error_counts[input];
}
int Hamming_10_6_3_TableImpl::encode(int input)
{
assert (input < 64 && input >= 0);
// Making use of a table...
return data.encode_parities[input];
}