Signal Metadata Format
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| Filename extensions | .sigmf, .sigmf-data, .sigmf-meta |
|---|---|
| Developed by | The GNU Radio Foundation |
| Initial release | February 1, 2017 |
| Latest release | v1.2.0 (April 12, 2024) |
| Type of format | time-series |
| Container for | Time series Signals |
| Contained by | JSON |
| Website | sigmf |
Signal Metadata Format (SigMF) is a standardized representation for recorded digital signal time series, typically encompassing real or complex-valued radio signals, acoustic waves, antenna positions, or sensor voltages.[1] The metadata is encapsulated in a JSON file with a .sigmf-meta extension, usually situated alongside the binary data stored in a file with a .sigmf-data extension. Extensions enable the addition of hierarchical data to a complete dataset, a capture, or a specific region of the recording.
History[edit]
Before the standardization of SigMF, time series data representing radio signals were commonly stored in flat binary files with external descriptors. Occasionally, researchers used Hierarchical Data Format (HDF5) containers (.hdf5), but these containers lack specificity to any data type. The VITA Radio Transport Standard a.k.a. VITA 49 (.vrt) was at times employed for RF data storage, although it is primarily designed as a transport format for RF signals rather than for data storage purposes[2]. Other proprietary formats were created by industry either to hold specific metadata or encode signals into proprietary containers.
In 2016 at the annual GNU Radio conference, a workshop focused on how a better open source container for RF signals could be constructed and maintained. In the following year the initial release of SigMF was created to provide a portable & annotated container for radio signals.
Widespread Adoption[edit]
| Entity | Purpose |
|---|---|
| National Telecommunications and Information Administration | Sharing and Reusing RF Measurement Data[3] |
| Northeastern University |
Datasets for RF Fingerprinting[4] |
| National Instruments | Generative AI RF Datasets[5] |
| SETI Breakthrough Listen | Data interchange format for data processing at the Green Bank Observatory.[6] |
References[edit]
- ↑ Hilburn, Ben (2018). "SigMF: The Signal Metadata Format". Proceedings of the GNU Radio Conference. 3 (1).
- ↑ Cooklev, Todor (November 27, 2012). "The VITA 49 Analog RF-Digital Interface" (PDF). www.vita.com. IEEE Circuits and Systems Magazine. Retrieved October 10, 2023.
- ↑ "ITS Releases Open Metadata Extensions for Sharing and Reusing RF Measurement Data". its.ntia.gov. April 2, 2020. Retrieved July 15, 2022.
- ↑ "Datasets for RF Fingerprinting". Retrieved July 15, 2022.
- ↑ "Using Generative AI To Connect Lab To Fab Test". Retrieved Aug 29, 2023.
- ↑ Croft, Steve (December 15, 2005). "SETI Open-Data". seti.berkeley.edu. Berkeley SETI Research Center. Retrieved July 14, 2022.
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External links[edit]
- SigMF Official website for the current specification & documentation.
- SigMF Python Package for reading, writing, and editing datasets.
- SigMF C++ Library
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