Channel Leakage Cancellation for Software Defined Radio (SDR) Narrowband Radar ...
summary
A two‑SDR MFCW radar using GNU Radio simulates and cancels transmit→receive leakage with an open‑air calibration that injects a negative image of the leakage; amplitude estimates show leakage 20–45% of received signal. Phase subtraction uses multiply‑conjugate e^{iφ}, add 2π and mod 2π to avoid wrap errors. Bandwidth drops from 1 GHz to a few kHz and measured distance error improves from ~25 cm to ~12 cm (single‑digit cm below 50 cm); Doppler tests on a taped fan also succeed.
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chapters (14)
- 0:00Introduction
- 0:34Background
- 2:29System Setup
- 3:26GNU Radio Code
- 4:24Radar Accuracy
- 5:54Radar Accuracy Algorithm
- 7:33Simulation
- 8:46Leakage Compensation
- 10:33Leakage Test
- 12:38Results
- 13:44Before and After
- 14:52Velocity Sensing
- 18:49Acknowledgements
- 20:03References
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