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srsLTE
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Added PRN sequence apply bit with state

This commit is contained in:
Xavier Arteaga 2021-05-20 13:43:49 +02:00 committed by Andre Puschmann
parent 1f38817b3b
commit de1b25558f
2 changed files with 18 additions and 11 deletions
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5
lib/include/srsran/phy/common/sequence.h
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@ -39,7 +39,10 @@ SRSRAN_API void srsran_sequence_state_gen_f(srsran_sequence_state_t* s, float va
SRSRAN_API void srsran_sequence_state_apply_f(srsran_sequence_state_t* s, const float* in, float* out, uint32_t length);
SRSRAN_API void
srsran_sequence_state_apply_bit(srsran_sequence_state_t* s, const uint8_t* in, uint8_t* out, uint32_t length);
srsran_sequence_state_apply_c(srsran_sequence_state_t* s, const int8_t* in, int8_t* out, uint32_t length);
SRSRAN_API
void srsran_sequence_state_apply_bit(srsran_sequence_state_t* s, const uint8_t* in, uint8_t* out, uint32_t length);
SRSRAN_API void srsran_sequence_state_advance(srsran_sequence_state_t* s, uint32_t length);

24
lib/src/phy/common/sequence.c
View File

@ -551,16 +551,13 @@ void srsran_sequence_apply_s(const int16_t* in, int16_t* out, uint32_t length, u
}
}
void srsran_sequence_apply_c(const int8_t* in, int8_t* out, uint32_t length, uint32_t seed)
void srsran_sequence_state_apply_c(srsran_sequence_state_t* s, const int8_t* in, int8_t* out, uint32_t length)
{
uint32_t x1 = sequence_x1_init; // X1 initial state is fix
uint32_t x2 = sequence_get_x2_init(seed); // loads x2 initial state
uint32_t i = 0;
if (length >= SEQUENCE_PAR_BITS) {
for (; i < length - (SEQUENCE_PAR_BITS - 1); i += SEQUENCE_PAR_BITS) {
uint32_t c = (uint32_t)(x1 ^ x2);
uint32_t c = (uint32_t)(s->x1 ^ s->x2);
uint32_t j = 0;
#ifdef LV_HAVE_SSE
@ -597,20 +594,27 @@ void srsran_sequence_apply_c(const int8_t* in, int8_t* out, uint32_t length, uin
}
// Step sequences
x1 = sequence_gen_LTE_pr_memless_step_par_x1(x1);
x2 = sequence_gen_LTE_pr_memless_step_par_x2(x2);
s->x1 = sequence_gen_LTE_pr_memless_step_par_x1(s->x1);
s->x2 = sequence_gen_LTE_pr_memless_step_par_x2(s->x2);
}
}
for (; i < length; i++) {
out[i] = in[i] * (((x1 ^ x2) & 1U) ? -1 : +1);
out[i] = in[i] * (((s->x1 ^ s->x2) & 1U) ? -1 : +1);
// Step sequences
x1 = sequence_gen_LTE_pr_memless_step_x1(x1);
x2 = sequence_gen_LTE_pr_memless_step_x2(x2);
s->x1 = sequence_gen_LTE_pr_memless_step_x1(s->x1);
s->x2 = sequence_gen_LTE_pr_memless_step_x2(s->x2);
}
}
void srsran_sequence_apply_c(const int8_t* in, int8_t* out, uint32_t length, uint32_t seed)
{
srsran_sequence_state_t sequence_state;
srsran_sequence_state_init(&sequence_state, seed);
srsran_sequence_state_apply_c(&sequence_state, in, out, length);
}
void srsran_sequence_state_apply_bit(srsran_sequence_state_t* s, const uint8_t* in, uint8_t* out, uint32_t length)
{
uint32_t i = 0;