Designing a Narrowband Radar using GNU Radio and Software Defined Radio for Tomography....
summary
Implements a narrowband radar using MFCW on GNU Radio with low-cost SDR hardware (two units, antennas built from coffee cans and Wi‑Fi elements) transmitting two CW tones in the 2.4–2.5 GHz band and only a few kHz of bandwidth to achieve 15 centimeter resolution. A dual SDR setup (single‑SDR hopping failed on LimeSDR Mini due to random start phase) measures phase deltas, includes a 2π unwrap correction, senses through drywall/water/oil and shows a remaining nonlinear phase error.
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chapters (17)
- 0:00Intro
- 1:00SCOPE OF WORK
- 2:51BACKGROUND INFO
- 3:28PROPOSING A NARROW BAND SOLUTION
- 4:19DESIGN GOAL
- 5:01MFCW RADAR DESIGN #1 (SINGLE SDR) *Using frequency hopping to replace the multiple frequency channels required
- 6:35BUILDING THE RADAR SYSTEM HARDWARE
- 7:06WRITING SOFTWARE WITH GNU RADIO (SINGLE SDR)
- 7:58TESTING RESULT FOR DESIGN #1: PARTIALLY WORKING
- 8:53MFCW RADAR DESIGN #2 (DUAL SDR)
- 9:49WRITING SOFTWARE WITH GNU RADIO (DUAL SDR)
- 10:34QUICK TEST - TARGET AT INTEGER MULTIPLE WAVELENGTH
- 11:31ALGORITHM FOR ARBITRARY DISTANCE CALCULATION
- 12:56TESTING RESULT FOR ARBITRARY TARGET DISTANCE
- 14:35EXPERIMENT PROCEDURE DEMO
- 16:09TOMOGRAPHY APPLICATIONS
- 17:55CONCLUSION
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