Time Delay Spectrometry Ultrasound with GNU Radio Capturing and Teaching the Principles
summary
GNU Radio Companion plus Jupyter implements time delay spectrometry with real demos: chirps synthesized and mixed to yield a constant beat tone that maps to range (a 0.6 kHz beat matches a 12.2 m round trip). Experiments move from simulated delay lines to laptop audio (3–20 kHz chirp truncated to ~7.5 kHz by mic filtering) to hardware using a HackRF transmitter and RTL-SDR receiver with coin‑sized transducers and about 2 MHz chirp bandwidth, built as a classroom kit with $20 software‑defined radios, code on GitHub.
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chapters (6)
- 0:00Start
- 0:36Why Use Gnu Radio for Fields outside of Communications
- 3:29Conventional Ultrasound
- 9:38Teaching How To Compute Range with Gnu Radio
- 20:24Compute the Range
- 26:37Prototyping Flow
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