US 12,284,028 B2
Signal masking for secure backscattered communication
Vaishnavi Nattar Ranganathan, Woodinville, WA (US); Nissanka Arachchige Bodhi Priyantha, Redmond, WA (US); Mike Nakahara, Kirkland, WA (US); Vikram Subramaniam Iyer, Seattle, WA (US); and Harsh Sandesh Desai, Pittsburgh, PA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Apr. 19, 2023, as Appl. No. 18/303,124.
Prior Publication US 2024/0356635 A1, Oct. 24, 2024
Int. Cl. H04B 7/22 (2006.01); H04B 1/18 (2006.01); H04B 10/114 (2013.01); H04B 11/00 (2006.01); H04B 13/00 (2006.01)
CPC H04B 7/22 (2013.01) [H04B 1/18 (2013.01); H04B 10/1149 (2013.01); H04B 11/00 (2013.01); H04B 13/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A radio frequency (RF) device, comprising:
a primary RF signal receiver configured to receive a RF carrier signal sent from a base station;
a secondary signal receiver configured to receive a masking audio signal from the base station;
a signal mixer configured to generate a response signal based at least on the RF carrier signal and generate a mixed signal by mixing the response signal and the masking audio signal; and
a transmitter configured to broadcast the mixed signal, via backscattering, as a masked backscattered signal.