Patent ID: 11906649
Assignee: ZAINAR, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A computer implemented method for a time difference of arrival (TDoA) ranging of wireless nodes in a wireless network architecture, comprising:
creating multiple distance estimate candidates between a tracker device have an unknown location and a first wireless node by using a known signal travel time between the first wireless node and a second wireless node;
obtaining, with the first wireless node, a receive time stamp of reception of a transmission from the tracker device;
obtaining, with the second wireless node, a receive time stamp of reception of the transmission from the tracker device;
obtaining, with the first wireless node, a receive time stamp of reception of a transmission from the second wireless node; and
generating a clock frequency offset estimation from the first wireless node and a receiver state dependent delay of the first wireless node.