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gnss-sdr/tests/unit-tests/system-parameters/qzss_code_generation_test.cc
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Carles Fernandez 028ebe433d QZSS: refine L1 C/B support 
- Restore true chip semantics for L1: QZSS_L1_CHIP_RATE is 1.023 Mcps and
  QZSS_L1_CODE_LENGTH is 1023 chips again. The replica carries
  QZSS_L1_SAMPLES_PER_CHIP = 2 samples per chip (L1 C/A chips duplicated,
  L1 C/B sinBOC(1,1) subchips), following the Galileo E1 approach. The
  generated waveform is unchanged, but Tracking_1J.early_late_space_chips
  is expressed in chips again, consistently with all other signals.
- Normalize the DLL discriminator with the sinBOC(1,1) correlation
  function when the tracked PRN broadcasts L1 C/B, selected per PRN in
  start_tracking(); warn if the configured correlator spacing falls
  outside the BOC(1,1) correlation main peak (> 0.33 chips).
- Attribute L1 C/B observables and ephemerides (PRN 203-206) to the PRN
  of the satellite's nominal PNT signals (RINEX 4.00, Table 6), so RINEX,
  RTCM and rtklib identify the transmitting satellite correctly and
  multi-frequency observations of the same satellite are paired instead
  of counted twice.
- Do not search QZSS L5 signals for PRNs above 202, which have no L5
  PRN code assigned in IS-QZSS-PNT.
- Remove reserved, non-operational PRNs 198 and 202 from the default
  QZSS search list; they remain selectable via the QZSS.prns option.
- Fix a potential std::out_of_range in
  GNSSFlowgraph::priorize_satellites() when assisted acquisition
  prioritizes satellites of a constellation with only a subset of its
  signals configured.
2026-07-04 15:31:03 +02:00

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/*!
* \file qzss_code_generation_test.cc
* \brief This file implements unit tests for the QZSS code generation
* \author Carles Fernández-Prades, 2026. cfernandez (at)) cttc.es
*
*
* -----------------------------------------------------------------------------
*
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2026 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
#include "qzss.h"
#include "qzss_signal_replica.h"
#include <gtest/gtest.h>
#include <vector>
TEST(QzssL1Code, Periodicity)
{
constexpr uint32_t prn = 193;
std::vector<float> code1(QZSS_L1_SAMPLES_PER_CHIP * QZSS_L1_CODE_LENGTH);
std::vector<float> code2(QZSS_L1_SAMPLES_PER_CHIP * QZSS_L1_CODE_LENGTH);
qzss_l1_code_gen_float(code1, prn);
qzss_l1_code_gen_float(code2, prn);
EXPECT_EQ(code1, code2);
}
TEST(QzssL1Code, GoldenFirst32Chips)
{
constexpr uint32_t prn = 193;
std::vector<float> code(QZSS_L1_SAMPLES_PER_CHIP * QZSS_L1_CODE_LENGTH);
qzss_l1_code_gen_float(code, prn);
const float golden[64] = {
-1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1,
1, 1, 1, 1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1,
1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1};
for (int i = 0; i < 64; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden[i]);
}
constexpr uint32_t prn2 = 195;
qzss_l1_code_gen_float(code, prn2);
const float golden2[64] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, -1, -1,
-1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 1, 1, 1, 1,
-1, -1, -1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1};
for (int i = 0; i < 64; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden2[i]);
}
constexpr uint32_t prn3 = 199;
qzss_l1_code_gen_float(code, prn3);
const float golden3[64] = {
1, 1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1,
-1, -1, 1, 1, -1, -1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1,
-1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, -1, -1};
for (int i = 0; i < 64; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden3[i]);
}
constexpr uint32_t prn4 = 205;
qzss_l1_code_gen_float(code, prn4);
const float golden4[64] = {
1, -1, 1, -1, 1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1,
1, -1, 1, -1, 1, -1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1,
1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1,
-1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1};
for (int i = 0; i < 64; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden4[i]);
}
}
TEST(QzssL5Code, L5IGoldenFirst32Chips)
{
std::vector<float> code(10230);
qzss_l5i_code_gen_float(code, 193);
const float golden[32] = {
1, -1, -1, -1, 1, -1, 1, 1,
1, 1, -1, -1, 1, 1, 1, -1,
1, -1, -1, 1, -1, -1, 1, -1,
-1, 1, 1, 1, -1, -1, -1, 1};
for (int i = 0; i < 32; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden[i]);
}
qzss_l5i_code_gen_float(code, 199);
const float golden2[32] = {
1, 1, -1, 1, 1, -1, 1, -1,
-1, 1, -1, 1, -1, -1, -1, -1,
1, 1, -1, 1, -1, -1, -1, 1,
-1, 1, 1, 1, 1, -1, 1, -1};
for (int i = 0; i < 32; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden2[i]);
}
qzss_l5i_code_gen_float(code, 196);
const float golden3[32] = {
-1, 1, 1, 1, -1, -1, -1, 1,
-1, -1, -1, -1, -1, -1, -1, -1,
1, -1, 1, 1, -1, 1, 1, -1,
1, -1, 1, -1, -1, -1, 1, -1};
for (int i = 0; i < 32; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden3[i]);
}
}
TEST(QzssL5Code, L5QGoldenFirst32Chips)
{
std::vector<float> code(10230);
qzss_l5q_code_gen_float(code, 193);
const float golden[32] = {
-1, -1, -1, 1, 1, 1, 1, -1,
-1, -1, 1, 1, -1, 1, 1, -1,
-1, 1, 1, -1, -1, -1, -1, -1,
1, 1, -1, -1, -1, -1, -1, 1};
for (int i = 0; i < 32; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden[i]);
}
qzss_l5q_code_gen_float(code, 199);
const float golden2[32] = {
-1, 1, 1, 1, -1, -1, -1, 1,
1, -1, -1, 1, 1, 1, 1, -1,
-1, -1, -1, -1, -1, 1, 1, 1,
-1, 1, 1, -1, 1, -1, -1, 1};
for (int i = 0; i < 32; ++i)
{
EXPECT_FLOAT_EQ(code[i], golden2[i]);
}
}
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