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This commit is contained in:
jLynx
2023-05-19 08:16:05 +12:00
committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
599 changed files with 70746 additions and 66896 deletions
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95
firmware/baseband/proc_acars.hpp
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@@ -76,63 +76,70 @@
// 16 taps, 1 symbol, 2 cycles
// Number of taps: size of one symbol in samples (in/symbol)
// Cycles:
// Cycles:
// Translate+rectangular filter
// sample=38.4k, deviation=4800, symbol=2400
// Length: 16 taps, 1 symbol, 2 cycles of sinusoid
// This is actually the same as rect_taps_307k2_38k4_1t_19k2_p
constexpr std::array<std::complex<float>, 16> rect_taps_38k4_4k8_1t_2k4_p { {
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
} };
constexpr std::array<std::complex<float>, 16> rect_taps_38k4_4k8_1t_2k4_p{{
{6.2500000000e-02f, 0.0000000000e+00f},
{4.4194173824e-02f, 4.4194173824e-02f},
{0.0000000000e+00f, 6.2500000000e-02f},
{-4.4194173824e-02f, 4.4194173824e-02f},
{-6.2500000000e-02f, 0.0000000000e+00f},
{-4.4194173824e-02f, -4.4194173824e-02f},
{0.0000000000e+00f, -6.2500000000e-02f},
{4.4194173824e-02f, -4.4194173824e-02f},
{6.2500000000e-02f, 0.0000000000e+00f},
{4.4194173824e-02f, 4.4194173824e-02f},
{0.0000000000e+00f, 6.2500000000e-02f},
{-4.4194173824e-02f, 4.4194173824e-02f},
{-6.2500000000e-02f, 0.0000000000e+00f},
{-4.4194173824e-02f, -4.4194173824e-02f},
{0.0000000000e+00f, -6.2500000000e-02f},
{4.4194173824e-02f, -4.4194173824e-02f},
}};
class ACARSProcessor : public BasebandProcessor {
public:
ACARSProcessor();
public:
ACARSProcessor();
void execute(const buffer_c8_t& buffer) override;
void execute(const buffer_c8_t& buffer) override;
private:
static constexpr size_t baseband_fs = 2457600;
private:
static constexpr size_t baseband_fs = 2457600;
BasebandThread baseband_thread { baseband_fs, this, NORMALPRIO + 20, baseband::Direction::Receive };
RSSIThread rssi_thread { NORMALPRIO + 10 };
BasebandThread baseband_thread{baseband_fs, this, NORMALPRIO + 20, baseband::Direction::Receive};
RSSIThread rssi_thread{NORMALPRIO + 10};
std::array<complex16_t, 512> dst { };
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
std::array<complex16_t, 512> dst{};
const buffer_c16_t dst_buffer{
dst.data(),
dst.size()};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0 { }; // Translate already done here !
dsp::decimate::FIRC16xR16x32Decim8 decim_1 { };
dsp::matched_filter::MatchedFilter mf { rect_taps_38k4_4k8_1t_2k4_p, 8 };
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0{}; // Translate already done here !
dsp::decimate::FIRC16xR16x32Decim8 decim_1{};
dsp::matched_filter::MatchedFilter mf{rect_taps_38k4_4k8_1t_2k4_p, 8};
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
4800, 2400, { 0.0555f },
[this](const float symbol) { this->consume_symbol(symbol); }
};
symbol_coding::ACARSDecoder acars_decode { };
/*PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder {
{ 0b011010000110100010000000, 24, 1 }, // SYN, SYN, SOH
{ },
{ 128 },
[this](const baseband::Packet& packet) {
this->payload_handler(packet);
}
};*/
baseband::Packet packet { };
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery{
4800,
2400,
{0.0555f},
[this](const float symbol) { this->consume_symbol(symbol); }};
symbol_coding::ACARSDecoder acars_decode{};
/*PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder {
{ 0b011010000110100010000000, 24, 1 }, // SYN, SYN, SOH
{ },
{ 128 },
[this](const baseband::Packet& packet) {
this->payload_handler(packet);
}
};*/
baseband::Packet packet{};
void consume_symbol(const float symbol);
void payload_handler(const baseband::Packet& packet);
void consume_symbol(const float symbol);
void payload_handler(const baseband::Packet& packet);
};
#endif/*__PROC_ACARS_H__*/
#endif /*__PROC_ACARS_H__*/