Code-Symbol Mapping

This page is the engineering crosswalk from canonical code identifiers back to the mathematical symbols defined in Notation Registry.

Capture And Geometry Fields

Canonical code identifier	Symbol	English name	Unit	Semantics	Implementation path	Test path
SourceConfig.center_frequency_hz	f_c	center frequency	Hz	Requested capture center frequency for a source	include/sdr_analyzer/config.hpp, src/core/session.cpp, src/sdr/rtltcp_source.cpp, src/sdr/uhd_source.cpp, src/sdr/soapy_source.cpp	tests/test_session.cpp, tests/test_record_replay.cpp
SourceConfig.sample_rate_hz	f_s	sample rate	Hz	Requested complex sample rate for a source	include/sdr_analyzer/config.hpp, src/core/session.cpp, src/sdr/simulator_source.cpp, src/sdr/rtltcp_source.cpp, src/sdr/uhd_source.cpp, src/sdr/soapy_source.cpp	tests/test_session.cpp, tests/test_record_replay.cpp, tests/test_export_helper.py
ProcessingConfig.fft_size	N_fft	FFT size	samples	Number of complex samples transformed per frame	include/sdr_analyzer/config.hpp, src/dsp/analyzer.cpp, src/cli/main.cpp, python/sdr_signal_analyzer/gui.py	tests/test_pipeline.cpp, tests/test_session.cpp, tests/test_gui_validation.py

Derived Spectrum Fields

Canonical code identifier	Symbol	English name	Unit	Semantics	Implementation path	Test path
SpectrumFrame.bin_resolution_hz	Δf	bin resolution	Hz/bin	Frequency spacing between adjacent bins, computed from f_s / N_fft	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_export_helper.py
SpectrumFrame.power_dbfs	P_k	bin power	dBFS/bin	Current-frame power spectrum after windowing and FFT normalization	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
SpectrumFrame.average_dbfs	\bar{P}_k	averaged bin power	dBFS/bin	Exponentially smoothed display spectrum	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp
SpectrumFrame.peak_hold_dbfs	H_k	peak-hold bin power	dBFS/bin	Maximum retained per bin while peak hold is enabled	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp

Analysis Outputs

Canonical code identifier	Symbol	English name	Unit	Semantics	Implementation path	Test path
AnalysisReport.noise_floor_dbfs	P_floor	noise floor	dBFS	Low-quantile estimate used as the baseline for heuristics	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
AnalysisReport.strongest_peak_dbfs	P_peak	strongest peak	dBFS	Maximum bin power in the current frame	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
AnalysisReport.burst_score	S_burst	burst score	unitless	Ratio heuristic used to label short-duty-cycle activity	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp
ProcessingConfig.detection_threshold_db	T_det	detection threshold offset	dB	Prominence cutoff for candidate peaks	include/sdr_analyzer/config.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
ProcessingConfig.bandwidth_threshold_db	T_bw	bandwidth threshold offset	dB	Lower bound used with the roll-off rule for occupied bandwidth	include/sdr_analyzer/config.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp

Marker And Detection Outputs

Canonical code identifier	Symbol	English name	Unit	Semantics	Implementation path	Test path
Marker.center_frequency_hz	f_m	marker center frequency	Hz	User-defined center of a measurement region	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_export_helper.py
Marker.bandwidth_hz	B_m	marker bandwidth	Hz	Width of a measurement region	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_export_helper.py
DetectionResult.center_frequency_hz	f_det	detection center frequency	Hz	Estimated location of a detected signal peak	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, src/cli/main.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_record_replay.cpp, tests/test_cli_export.py
DetectionResult.offset_hz	f_offset	detection offset	Hz	Difference between f_det and f_c	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
DetectionResult.bandwidth_hz	B_det	detection bandwidth	Hz	Estimated occupied bandwidth for one detection	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_record_replay.cpp, tests/test_export_helper.py
DetectionResult.peak_power_dbfs	P_det	detection peak power	dBFS	Peak power at the detection bin	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp	tests/test_pipeline.cpp, tests/test_record_replay.cpp
DetectionResult.labels	L_det	detection labels	unitless	Descriptive heuristic labels applied to a detection	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, src/cli/main.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_record_replay.cpp, tests/test_cli_export.py

Export And Session Surfaces

Canonical code identifier	Symbol	English name	Unit	Semantics	Implementation path	Test path
AnalyzerSnapshot.sequence	n	frame sequence	count	Monotonic snapshot counter within a session	include/sdr_analyzer/results.hpp, src/core/session.cpp, python/sdr_signal_analyzer/export.py	tests/test_session.cpp, tests/test_cli_export.py
MarkerMeasurement.peak_power_dbfs	P_marker,peak	marker peak power	dBFS	Peak power within a marker region in one frame	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_export_helper.py
MarkerMeasurement.average_power_dbfs	P_marker,avg	marker average power	dBFS	Mean power within a marker region in one frame	include/sdr_analyzer/results.hpp, src/dsp/analyzer.cpp, python/sdr_signal_analyzer/export.py	tests/test_pipeline.cpp, tests/test_export_helper.py