mSense: Towards Mobile Material Sensing with a Single Millimeter-Wave Radio
summary
A prototype reuses an 802.11ay single 60GHz mmWave radio with an added 32-element array and 3.52 GHz bandwidth to act as radar, outputs CIR and uses subsample peak interpolation, synchronization via transmitter–receiver leakage, and noise cancellation to reach sub-centimeter range estimates. A derived Material Reflection Feature normalizes amplitude by distance to classify materials; experiments on five material types and 21 objects report 93% overall accuracy and ~90% in mobile scenarios.
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