SweepSense: Sensing 5 GHz in 5 Milliseconds with Low-cost Radios

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" summary

SweepSense is a low-cost radio design that rapidly sweeps across wide frequency ranges (e.g., 2.4 GHz and LTE bands) to achieve millisecond-scale temporal resolution. It handles the resulting distorted, sparse samples by using self-generated calibration data to correct distortions and then classifies which protocol produced each transmission from only a fraction of samples, enabling concurrent identification of multiple protocols and monitoring of disjoint LTE bands.

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" chapters (18)

1. 0:00Intro
2. 0:20We need wide-bandwidth and high-time resolution sensing
3. 1:37Spectrum analyzers sense with wide bandwidth
4. 3:22SweepSense: A new paradigm in spectrum sensing
5. 4:33SweepSense Overview
6. 5:08Background: Radio receivers tune by generating a tone
7. 6:09Generating a sweeping tone makes the receiver sweep
8. 6:54A typical local oscillator is a VCO feedback loop
9. 7:40SweepSense replaces the feedback loop with a ramp
10. 11:31Swept captures contain significant portions of packets
11. 13:06Challenge - We only capture a part of the packet
12. 13:41Protocol detection only requires short captures
13. 15:23Cyclostationary patterns are distinct for each protocol
14. 16:16Sensing protocols in Unlicensed band
15. 17:43Radar detection in CBRS band
16. 18:30SweepSense creates new spectrum sharing opportunities
17. 19:11Conclusion
18. 19:37SweepSense begins!