Radio frequency-based crowd analytics

US12412468B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Deepak Vasisht · Cambridge, US
• Manikanta KOTARU · Kenmore, US
• Nissanka Arachchige Bodhi Priyantha · Redmond, US
• Ranveer Chandra · Kirkland, US
• Jiaming Wang · Lanzhou, CN

Key dates

• Filing date: Oct 1, 2021
• Grant date: Sep 9, 2025
• Expiry date: May 24, 2044

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q30/0201
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A deployment of sensors transmit radio frequency (RF) signals into an area of interest. The radar maps are generated from the reflected signals, including a static radar map and a dynamic radar map. Multipath and radar sidelobes are removed from the radar maps using a neural network to produce a density map. The neural network can be trained in two phases: a training phase that uses training data from a training site and a transfer learning phase that uses training data from the area of interest.