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https://github.com/gnss-sdr/gnss-sdr
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Implement Spirent GSS6450 file signal source
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29b8643def
commit
282c3d8659
@ -78,8 +78,8 @@ SpirGSS6450FileSignalSource::SpirGSS6450FileSignalSource(ConfigurationInterface*
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{
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file_source_ = gr::blocks::file_source::make(item_size_, filename_.c_str(), repeat_);
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file_source_->seek(bytes_seek, SEEK_SET);
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unpack_ii_ = gr::blocks::packed_to_unpacked_ii::make(2 * adc_bits_, gr::GR_MSB_FIRST);
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unpack_spir_ = make_unpack_spir_gss6450_samples(n_channels_, sel_ch_, item_size_);
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unpack_ii_ = gr::blocks::packed_to_unpacked_ii::make(adc_bits_, gr::GR_MSB_FIRST);
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unpack_spir_ = make_unpack_spir_gss6450_samples(n_channels_, sel_ch_, samples_per_item, item_size_);
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}
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catch (const std::exception &e)
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{
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@ -139,8 +139,7 @@ SpirGSS6450FileSignalSource::SpirGSS6450FileSignalSource(ConfigurationInterface*
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}
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CHECK(samples_ > 0) << "File does not contain enough samples to process.";
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double signal_duration_s;
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signal_duration_s = static_cast<double>(samples_) * ( 1 /static_cast<double>(sampling_frequency_));
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double signal_duration_s = static_cast<double>(samples_) * ( 1 /static_cast<double>(sampling_frequency_));
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LOG(INFO) << "Total number samples to be processed= " << samples_ << " GNSS signal duration= " << signal_duration_s << " [s]";
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std::cout << "GNSS signal recorded time to be processed: " << signal_duration_s << " [s]" << std::endl;
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@ -34,14 +34,14 @@
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unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, size_t item_size)
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unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, int samp_item, size_t item_size)
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{
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return unpack_spir_gss6450_samples_sptr(new unpack_spir_gss6450_samples(n_chann, sel_ch, item_size));
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return unpack_spir_gss6450_samples_sptr(new unpack_spir_gss6450_samples(n_chann, sel_ch, samp_item, item_size));
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}
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unpack_spir_gss6450_samples::unpack_spir_gss6450_samples(
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unsigned int n_chann, unsigned int sel_ch, size_t item_size) : gr::block("unpack_spir_gss6450_samples",
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unsigned int n_chann, unsigned int sel_ch, int samp_item, size_t item_size) : gr::block("unpack_spir_gss6450_samples",
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gr::io_signature::make(1, 1, sizeof(int)),
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gr::io_signature::make(1, 1, sizeof(gr_complex)))
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{
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@ -49,27 +49,108 @@ unpack_spir_gss6450_samples::unpack_spir_gss6450_samples(
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d_sel_ch = sel_ch;
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item_size_ = item_size;
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ch_processing = 1;
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}
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void unpack_spir_gss6450_samples::forecast(int noutput_items, gr_vector_int &ninput_items_required)
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{
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ninput_items_required[0] = d_channels * noutput_items;
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d_samp_item = samp_item;
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samp_frame = 0;
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adc_bits = 16 / d_samp_item;
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i_ = true;
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new_sample = false;
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i_data = 0;
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q_data = 0;
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}
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unpack_spir_gss6450_samples::~unpack_spir_gss6450_samples()
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{}
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void unpack_spir_gss6450_samples::process_sample(gr_complex* out)
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{
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gr_complex result = gr_complex(0.5, 0.5);
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compute_two_complement(i_data);
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compute_two_complement(q_data);
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result += gr_complex(static_cast<float>(i_data), static_cast<float>(q_data));
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*out = result;
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}
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int unpack_spir_gss6450_samples::general_work(int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items)
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{
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const int *in = reinterpret_cast<const int *>(input_items[0]);
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gr_complex *out = reinterpret_cast<gr_complex*>(output_items[0]);
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return noutput_items;
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const int* in = reinterpret_cast<const int*>(input_items[0]);
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gr_complex* out = reinterpret_cast<gr_complex*>(output_items[0]);
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int samples_produced = 0;
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for(int i = 0; i < noutput_items; i++)
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{
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if(ch_processing == d_sel_ch)
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{
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if(i_)
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{
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i_data = in[i];
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swap_data(i_data);
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i_ = false;
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}
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else
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{
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q_data = in[i];
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swap_data(q_data);
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i_ = true;
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process_sample(out);
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out++;
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samples_produced++;
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new_sample = true;
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}
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}
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else
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{
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if(i_) { i_ = false;}
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else
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{
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i_ = true;
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new_sample = true;
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}
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}
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if(new_sample)
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{
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new_sample = false;
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samp_frame++;
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if(samp_frame == d_samp_item)
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{
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samp_frame = 0;
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ch_processing++;
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if(ch_processing > d_channels) { ch_processing = 1; }
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}
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}
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}
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consume_each(noutput_items);
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return samples_produced;
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}
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void unpack_spir_gss6450_samples::swap_data(int& data)
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{
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int result = 0;
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int aux = data;
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int mask = 1;
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for (int i = 0; i < adc_bits; i++)
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{
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result = result << 1;
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result += (aux & mask);
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aux = aux >> 1;
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}
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data = result;
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}
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void unpack_spir_gss6450_samples::compute_two_complement(int& data)
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{
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int result = 0;
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int mask = 1;
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for(int i = 0; i < (adc_bits - 1); i++)
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{
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result = result << 1;
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result += (data >> i) & mask;
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}
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if((data >> (adc_bits - 1)) == 1)
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{
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if(adc_bits == 2) { result -= 2; }
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else { result -= 8; }
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}
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data = result;
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}
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@ -37,7 +37,7 @@ class unpack_spir_gss6450_samples;
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typedef boost::shared_ptr<unpack_spir_gss6450_samples> unpack_spir_gss6450_samples_sptr;
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unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, size_t item_size);
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unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, int samp_item, size_t item_size);
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class unpack_spir_gss6450_samples: public gr::block
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@ -46,17 +46,25 @@ public:
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int general_work (int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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void forecast(int noutput_items, gr_vector_int &ninput_items_required);
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friend unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples_sptr(unsigned int n_chann, unsigned int sel_ch, int samp_item, size_t item_size);
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unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, int samp_item, size_t item_size);
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~unpack_spir_gss6450_samples();
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private:
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unsigned int d_channels;
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unsigned int d_sel_ch;
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unsigned int ch_processing;
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int d_samp_item;
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int samp_frame;
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int adc_bits;
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size_t item_size_;
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friend unpack_spir_gss6450_samples_sptr make_unpack_spir_gss6450_samples_sptr(unsigned int n_chann, unsigned int sel_ch, size_t item_size);
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unpack_spir_gss6450_samples(unsigned int n_chann, unsigned int sel_ch, size_t item_size);
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void process_sample(gr_complex* out);
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void swap_data(int& data);
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void compute_two_complement(int& data);
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bool i_;
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bool new_sample;
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int i_data;
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int q_data;
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};
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#endif
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@ -48,6 +48,7 @@
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#include "nsr_file_signal_source.h"
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#include "two_bit_cpx_file_signal_source.h"
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#include "spir_file_signal_source.h"
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#include "spir_gss6450_file_signal_source.h"
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#include "rtl_tcp_signal_source.h"
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#include "two_bit_packed_file_signal_source.h"
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#include "channel.h"
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@ -864,6 +865,21 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
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out_streams, queue));
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block = std::move(block_);
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}
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catch (const std::exception &e)
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{
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std::cout << "GNSS-SDR program ended." << std::endl;
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exit(1);
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}
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}
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else if (implementation.compare("Spir_GSS6450_File_Signal_Source") == 0)
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{
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try
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{
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std::unique_ptr<GNSSBlockInterface> block_(new SpirGSS6450FileSignalSource(configuration.get(), role, in_streams,
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out_streams, queue));
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block = std::move(block_);
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}
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catch (const std::exception &e)
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{
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