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Baseband downconverting PulseBlanking

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Added an IF to baseband downconverting stage previous to the pulse blanking filter
This commit is contained in:
Antonio Ramos 2017-10-31 20:28:34 +01:00
parent afb3aa14f6
commit dceb15acdc
2 changed files with 26 additions and 2 deletions
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26
src/algorithms/input_filter/adapters/pulse_blanking_filter.cc
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@ -32,6 +32,7 @@
#include <boost/lexical_cast.hpp> #include <boost/lexical_cast.hpp>
#include <glog/logging.h> #include <glog/logging.h>
#include "configuration_interface.h" #include "configuration_interface.h"
#include <vector>
using google::LogMessage; using google::LogMessage;
@ -71,7 +72,13 @@ PulseBlankingFilter::PulseBlankingFilter(ConfigurationInterface* configuration,
item_size = sizeof(gr_complex); //avoids uninitialization item_size = sizeof(gr_complex); //avoids uninitialization
input_size_ = sizeof(gr_complex); //avoids uninitialization input_size_ = sizeof(gr_complex); //avoids uninitialization
} }
float default_if = 0.0;
float if_ = config_->property(role_ + ".if", default_if);
if (if_ > 0.0)
{
const std::vector<float> taps = { 1.0 }; //All-pass filter
freq_xlating_ = gr::filter::freq_xlating_fir_filter_ccf::make(1, taps, if_, config_->property("SignalSource.sampling_frequency", 2000000));
}
if (dump_) if (dump_)
{ {
DLOG(INFO) << "Dumping output into file " << dump_filename_; DLOG(INFO) << "Dumping output into file " << dump_filename_;
@ -95,6 +102,10 @@ void PulseBlankingFilter::connect(gr::top_block_sptr top_block)
{ {
top_block->connect(pulse_blanking_cc_, 0, file_sink_, 0); top_block->connect(pulse_blanking_cc_, 0, file_sink_, 0);
} }
if (config_->property(role_ + ".if", 0.0) > 0.0)
{
top_block->connect(freq_xlating_, 0, pulse_blanking_cc_, 0);
}
} }
else else
@ -113,6 +124,10 @@ void PulseBlankingFilter::disconnect(gr::top_block_sptr top_block)
{ {
top_block->disconnect(pulse_blanking_cc_, 0, file_sink_, 0); top_block->disconnect(pulse_blanking_cc_, 0, file_sink_, 0);
} }
if (config_->property(role_ + ".if", 0.0) > 0.0)
{
top_block->disconnect(freq_xlating_, 0, pulse_blanking_cc_, 0);
}
} }
else else
{ {
@ -125,7 +140,14 @@ gr::basic_block_sptr PulseBlankingFilter::get_left_block()
{ {
if (input_item_type_.compare("gr_complex") == 0) if (input_item_type_.compare("gr_complex") == 0)
{ {
return pulse_blanking_cc_; if (config_->property(role_ + ".if", 0.0) > 0.0)
{
return freq_xlating_;
}
else
{
return pulse_blanking_cc_;
}
} }
else else
{ {

2
src/algorithms/input_filter/adapters/pulse_blanking_filter.h
View File

@ -35,6 +35,7 @@
#include <string> #include <string>
#include <vector> #include <vector>
#include <gnuradio/blocks/file_sink.h> #include <gnuradio/blocks/file_sink.h>
#include <gnuradio/filter/freq_xlating_fir_filter_ccf.h>
#include "gnss_block_interface.h" #include "gnss_block_interface.h"
#include "pulse_blanking_cc.h" #include "pulse_blanking_cc.h"
@ -82,6 +83,7 @@ private:
unsigned int out_streams_; unsigned int out_streams_;
gr::blocks::file_sink::sptr file_sink_; gr::blocks::file_sink::sptr file_sink_;
pulse_blanking_cc_sptr pulse_blanking_cc_; pulse_blanking_cc_sptr pulse_blanking_cc_;
gr::filter::freq_xlating_fir_filter_ccf::sptr freq_xlating_;
}; };
#endif // GNSS_SDR_PULSE_BLANKING_FILTER_H_ #endif // GNSS_SDR_PULSE_BLANKING_FILTER_H_