Verification and Redesign of OFDM Backscatter

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" summary

Identifies why OFDM backscatter fails: WiFi receiver phase error correction cancels symbol-level tag phase shifts, breaking codeword-translation designs. Proposes TScatter that uses sample-level modulation and models pilot tracking plus phase-error correction so square-wave changes survive decoding. Builds hardware compatible with open-source backscatter platforms and a lightweight demodulator. Evaluation shows either three to four orders of magnitude lower BER than MOXcatter at similar throughput, or over 212× higher throughput at comparable BER, across WiFi OFDM settings.

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" chapters (9)

1. 0:00Introduction
2. 0:35Backscatter and OFDM
3. 1:26Architecture
4. 2:33How it works
5. 4:38Tscatter
6. 6:03Demodulation
7. 6:51Light Version
8. 10:05Evaluation
9. 11:42Contributions

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