PAIRWISE MEASUREMENTS FOR IMPROVED POSITION DETERMINATION

• US 20160097850A1
• Filed: 12/11/2015
• Published: 04/07/2016
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: VENKATRAMAN, Sai Pradeep, DO, Ju-yong
• Granted Patent: US 9,817,112 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 13/765 with exchange of information between interrogator and responder
• CPC Class Codes: G01S 5/021 Calibration, monitoring or correction G01S5/0252 takes precedence

Abstract

Approaches for enhancing range-based position determination using pairwise error detection and compensation are provided. One method for enhancing a position estimate of a first node may include performing measurements at the first node using a signal received from a second node, and receiving measurements from the second node. The received measurements may be performed at the second node using a signal provided by the first node. The method may further include determining pairwise comparisons of the performed measurements and the received measurements, and compensating the measurements performed at the first node, based on the pairwise comparisons, for estimating the position of the first node. Systems and apparatuses for performing the various position determination methods are further presented.

Claims

1. A method for triggering an enhanced a position estimate of a first node using pairwise measurements, comprising:

receiving Round Trip Time (RTT) and Received Signal Strength Indicator (RSSI) measurements from a plurality of neighboring nodes, wherein the RTT and RSSI measurements are performed at the neighboring nodes using a signal provided by the first node;

evaluating a quality of the RTT and RSSI measurements received from the neighboring nodes, and performing pairwise comparison and compensation with each neighboring node associated with the RTT and/or RSSI measurements which fail the evaluating;

determining a position estimate of the first node based on the RTT measurements and RSSI measurements which pass the evaluating; and

comparing information based on the RTT measurements and/or the RSSI measurements with information derived from the position estimate, and performing pairwise comparison and compensation with each neighboring node associated with RTT measurements and/or RSSI measurements which compare unfavorably.