49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#ifndef MGD_DECODER_H
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#define MGD_DECODER_H
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#include <array>
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#include <cstdint>
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#include <cmath>
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#include <vector>
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class MGDDecoder {
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public:
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MGDDecoder(size_t baud_rate, bool is_frequency_hopping) : baud_rate(baud_rate), is_frequency_hopping(is_frequency_hopping) {}
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/**
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* @brief Decodes the grouped symbols using Modified Gray Decoding (MGD).
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* @param symbols The input symbols to be decoded.
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* @return A vector of decoded symbols.
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*/
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std::vector<uint8_t> mgdDecode(const std::vector<uint8_t>& symbols) {
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std::vector<uint8_t> decodedSymbols;
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for (uint8_t symbol : symbols) {
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if (baud_rate == 2400 || baud_rate == 4800) {
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decodedSymbols.push_back(mgd8psk(symbol));
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} else if (baud_rate == 1200 || (baud_rate == 75 && !is_frequency_hopping)) {
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decodedSymbols.push_back(mgd4psk(symbol));
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} else {
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decodedSymbols.push_back(symbol);
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}
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}
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return decodedSymbols;
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}
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private:
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size_t baud_rate;
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bool is_frequency_hopping;
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int mgd8psk(int input) {
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static std::array<int, 8> lookupTable = {0, 1, 3, 2, 7, 6, 4, 5};
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return lookupTable[input];
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}
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int mgd4psk(int input) {
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static std::array<int, 4> lookupTable = {0, 1, 3, 2};
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return lookupTable[input];
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}
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};
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#endif |