kopia lustrzana https://github.com/M17-Project/M17_Implementations
added soft bit (de)randomizer too
rodzic
f657d03527
commit
47dae3c230
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@ -103,6 +103,7 @@ void soft_XOR(uint16_t* out, const uint16_t* a, const uint16_t* b, const uint8_t
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extern const uint8_t rand_seq[46];
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void randomize_bits(uint8_t inp[SYM_PER_PLD*2]);
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void randomize_soft_bits(uint16_t inp[SYM_PER_PLD*2]);
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// M17 C library - lib/phy/slice.c
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void slice_symbols(uint16_t out[2*SYM_PER_PLD], const float inp[SYM_PER_PLD]);
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@ -31,3 +31,19 @@ void randomize_bits(uint8_t inp[SYM_PER_PLD*2])
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}
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}
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}
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/**
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* @brief Randomize type-4 unpacked bits.
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*
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* @param inp Input 368 soft type-4 bits.
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*/
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void randomize_soft_bits(uint16_t inp[SYM_PER_PLD*2])
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{
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for(uint16_t i=0; i<SYM_PER_PLD*2; i++)
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{
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if((rand_seq[i/8]>>(7-(i%8)))&1) //flip bit if '1'
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{
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inp[i]=soft_bit_NOT(inp[i]);
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}
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}
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}
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@ -82,11 +82,7 @@ int main(void)
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slice_symbols(soft_bit, pld);
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//derandomize
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for(uint16_t i=0; i<SYM_PER_PLD*2; i++)
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{
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if((rand_seq[i/8]>>(7-(i%8)))&1) //soft NOT. flip soft bit if "1"
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soft_bit[i]=soft_bit_NOT(soft_bit[i]);
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}
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randomize_soft_bits(soft_bit);
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//deinterleave
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reorder_soft_bits(d_soft_bit, soft_bit);
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