US 12,253,596 B2
Ad hoc positioning of mobile devices using near ultrasound signals
Wilfred Edwin Booij, Oslo (NO); and Mattheus Franciscus Albertus Ten Veldhuis, Oslo (NO)
Assigned to Sonitor Technologies AS, Oslo (NO)
Filed by Sonitor Technologies AS, Oslo (NO)
Filed on Jan. 31, 2023, as Appl. No. 18/103,616.
Application 18/103,616 is a continuation of application No. 16/965,506, granted, now 11,567,195, previously published as PCT/IB2019/050680, filed on Jan. 28, 2019.
Claims priority of provisional application 62/623,215, filed on Jan. 29, 2018.
Prior Publication US 2023/0314603 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 15/32 (2006.01); G01S 5/00 (2006.01); G01S 5/30 (2006.01)
CPC G01S 15/325 (2013.01) [G01S 5/0009 (2013.01); G01S 5/30 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
modulating an acoustic signal to form a transmitted acoustic signal, the transmitted acoustic signal having a narrow autocorrelation function;
transmitting, by a speaker in a mobile device, the transmitted acoustic signal;
receiving, by a microphone within the mobile device, a received acoustic signal, the received acoustic signal resulting from an interaction by the transmitted acoustic signal with a local acoustic environment in which the mobile device is located;
deconvolving the received acoustic signal with the transmitted acoustic signal to generate a room response trace;
comparing the room response trace to a subset of a plurality of modeled room response traces, at least one of the subset of the plurality of modeled room response traces being calculated based on a model of a building in the local acoustic environment, each of the subset of the plurality of modeled room response traces being previously calculated and stored on one of the mobile device or a central server, wherein the subset of the plurality of modeled room response traces are identified as being likely acoustic environments based on a location history of the mobile device; and
determining a location of the mobile device based on the comparing the room response trace.