US 12,108,362 B2
Systems and methods for precise radio frequency localization in the presence of multiple communication paths
Manu Seth, Redwood City, CA (US); Lingkai Kong, Redwood City, CA (US); Tommi Ylamurto, Redwood City, CA (US); and Vivek Subramanian, Redwood City, CA (US)
Assigned to ZaiNar, Inc, Redwood City, CA (US)
Filed by ZaiNar, Inc, Redwood City, CA (US)
Filed on May 8, 2023, as Appl. No. 18/144,807.
Application 16/894,023 is a division of application No. 15/173,531, filed on Jun. 3, 2016, granted, now 10,757,675, issued on Aug. 25, 2020.
Application 18/144,807 is a continuation of application No. 16/894,023, filed on Jun. 5, 2020, granted, now 11,683,779.
Prior Publication US 2023/0362876 A1, Nov. 9, 2023
Int. Cl. H04W 64/00 (2009.01); G01S 5/02 (2010.01); H04L 41/12 (2022.01); H04L 43/0864 (2022.01); H04L 45/121 (2022.01); H04L 45/122 (2022.01); H04L 47/283 (2022.01); H04W 28/02 (2009.01)
CPC H04W 64/003 (2013.01) [G01S 5/0218 (2020.05); G01S 5/0268 (2013.01); G01S 5/0289 (2013.01); H04L 41/12 (2013.01); H04L 43/0864 (2013.01); H04L 45/121 (2013.01); H04L 45/122 (2013.01); H04L 47/283 (2013.01); H04W 28/0236 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A system for localization of nodes in a wireless network architecture, comprising:
a first wireless node having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture; and
a second wireless node having a wireless device with a transmitter and a receiver to enable bi-directional communications with the first wireless node in the wireless network architecture, wherein the one or more processing units of the first wireless node are configured to execute instructions to determine a time of flight estimate for localization based on implementing a path estimate algorithm that determines signal amplitudes of received signals of multiple paths between the first and second wireless nodes for communications received from the second wireless node, compares the signal amplitudes of the received signals of the multiple paths to a threshold, and eliminates a false short path of the multiple paths when the signal amplitude for the false short path compares in a predetermined manner to the threshold.