Accurate localization of a large number of objects over a wide area is one of the keys to the pervasive interaction with the Internet of Things. Our technique, for the first time, offers over (i) hundred-scale simultaneous 3D localization at (ii) subcentimeter accuracy for over an (iii) hectometer distance. The performance practically applies to indoors and outdoors as well as under mobility. Our custom backscatter consumes only 8.4 microwatts of power – i.e., over 40 years of battery life on a single cell. The tag's Van Atta array design with retro-reflectivity in both elevation and azimuth planes offers 3D localization and effectively suppresses the multipath. Our system is compatible to the commodity FMCW radar with a lightweight signal processing.  It uniquely leverages the interplay between the tag signal and clutter to boost the signal quality by six orders of magnitude, and leverages the signal spectral leakage for fine-grained positioning. 

Hawkeye Hardware Design and Localization Tool can be found at this link.

This tool is the artifact for "Hawkeye: Hectometer-range Subcentimeter Localization for Large-scale mmWave Backscatter". HFSS Hawkeye tag design file, as well as MATLAB super-resolution algorithm, are provided.

• [ACM MobiSys'24] SuperSight: Sub-cm NLOS Localization for mmWave Backscatter (Conditionally Accepted)

• [ACM GetMobile'24] OmniScatter: Extreme Sensitivity mmWave Backscattering Using Commodity FMCW Radar

• [ACM MobiSys'23] Hawkeye: Hectometer-range Subcentimeter Localization for Large-scale mmWave Backscatter

• [ACM MobiSys'23 Poster] Poster: Submillimeter Localization for mmWave Backscatter Using Commodity 77 GHz Radar 

• [ACM MobiSys'22] OmniScatter: Extreme Sensitivity mmWave Backscattering Using Commodity FMCW Radar  (Best Paper Award, SIGMOBILE Research Highlight)