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Improved prn length estimation when performing extended correlation in the FPGA.

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This commit is contained in:
Marc Majoral
2019-11-05 13:05:01 +01:00
parent afb2eb16c6
commit 0e9fc67e0e
1 changed files with 4 additions and 4 deletions
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8
src/algorithms/tracking/gnuradio_blocks/dll_pll_veml_tracking_fpga.cc
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@@ -1860,8 +1860,8 @@ int dll_pll_veml_tracking_fpga::general_work(int noutput_items __attribute__((un
// this must be computed for the secondary prn code // this must be computed for the secondary prn code
if (d_secondary) if (d_secondary)
{ {
uint32_t first_prn_length = d_current_integration_length_samples - (d_fpga_integration_period - 1) * static_cast<int32_t>(std::floor(T_prn_samples)); uint32_t next_prn_length = d_current_integration_length_samples/d_fpga_integration_period;
uint32_t next_prn_length = static_cast<int32_t>(std::floor(T_prn_samples)); uint32_t first_prn_length = d_current_integration_length_samples - next_prn_length*(d_fpga_integration_period - 1);
multicorrelator_fpga->update_prn_code_length(first_prn_length, next_prn_length); multicorrelator_fpga->update_prn_code_length(first_prn_length, next_prn_length);
} }
@@ -1913,8 +1913,8 @@ int dll_pll_veml_tracking_fpga::general_work(int noutput_items __attribute__((un
// this must be computed for the secondary prn code // this must be computed for the secondary prn code
if (d_secondary) if (d_secondary)
{ {
uint32_t first_prn_length = d_current_integration_length_samples - (d_fpga_integration_period - 1) * static_cast<int32_t>(std::floor(T_prn_samples)); uint32_t next_prn_length = d_current_integration_length_samples/d_fpga_integration_period;
uint32_t next_prn_length = static_cast<int32_t>(std::floor(T_prn_samples)); uint32_t first_prn_length = d_current_integration_length_samples - next_prn_length*(d_fpga_integration_period - 1);
multicorrelator_fpga->update_prn_code_length(first_prn_length, next_prn_length); multicorrelator_fpga->update_prn_code_length(first_prn_length, next_prn_length);
} }