VMscatter: A Versatile MIMO Backscatter
summary
Implements space-time coding on tag using only on/off reflection states to achieve full MIMO diversity, with a practical hardware prototype (tested as 2×4×4) and generic extension to arbitrary antenna counts. Tackles channel complexity via pre-scatter elimination and post-scatter equalization, embeds reference symbols in packets, and decodes with maximum-likelihood. Claims negligible tag overhead, roughly fourfold throughput in throughput mode, and an empirical 862x BER reduction compared to MOXcatter across real-world deployments.
AI-written summary · about
chapters (16)
- 0:00Introduction
- 0:26Backscatter
- 1:11MIMO Backscatter
- 2:56Diversity
- 4:02Challenges
- 5:00Outline
- 5:12Modulation
- 5:32Conjugation
- 6:31Improving throughput
- 7:07Demodulation
- 7:19Backscatter Packet
- 8:22Backscatter Data
- 9:04Channel Interference
- 9:15Channel Referencing
- 11:50throughput
- 12:02Key Contribution
related talks
19mNetScatter: Enabling Large-Scale Backscatter Networks
25mPerformance Evaluation of MIMO Techniques With an SDR-Based Prototype
06mRelacks: Reliable Backscatter Communication in Indoor Environments
17mμMote: Enabling Passive Chirp De-spreading and μW-level Long-Range Downlink
06mEmbracing Collisions to Increase Fidelity of Sensing Systems with COTS Tags
13mLeakyScatter: A Frequency-Agile Directional Backscatter Network Above 100 GHz
26mWhat's Your Angle? Practical Considerations When Developing Phase Coherent RF...
23mExponent: Arbitrary Bandwidth Receiver Architecture