	US 12,273,225 B2
	Frequency difference for ambient device decoding
Zhifei Fan, San Diego, CA (US); Jing Sun, San Diego, CA (US); and Piyush Gupta, Bridgewater, NJ (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 15, 2023, as Appl. No. 18/317,840.
Prior Publication US 2024/0388489 A1, Nov. 21, 2024
Int. Cl. H04L 27/26 (2006.01)

CPC H04L 27/2626 (2013.01)

22 Claims

1. A reader device for wireless communication, comprising:

one or more memories; and

one or more processors, coupled to the one or more memories, configured to:

transmit a delta message that indicates a frequency difference between a data tone frequency for the reader device and a helper tone frequency; and

transmit a data tone signal at the data tone frequency and a helper tone signal at the helper tone frequency, wherein the helper tone signal is a waveform shared among multiple reader devices.