US 12,449,504 B2
Position determination system having a deconvolution decoder
Wilfred Edwin Booij, Oslo (NO)
Assigned to Sonitor Technologies AS, Oslo (NO)
Filed by Sonitor Technologies AS, Oslo (NO)
Filed on May 7, 2024, as Appl. No. 18/656,820.
Application 18/656,820 is a continuation of application No. 17/991,064, filed on Nov. 21, 2022, granted, now 11,977,176.
Application 17/991,064 is a continuation of application No. 16/890,585, filed on Jun. 2, 2020, granted, now 11,506,747, issued on Nov. 22, 2022.
Application 16/890,585 is a continuation of application No. 15/858,700, filed on Dec. 29, 2017, granted, now 10,670,693, issued on Jun. 2, 2020.
Prior Publication US 2024/0288531 A1, Aug. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 5/18 (2006.01); G01S 3/802 (2006.01); G01S 3/808 (2006.01); G01S 5/30 (2006.01); G01S 11/14 (2006.01); G01S 15/89 (2006.01); H04B 11/00 (2006.01)
CPC G01S 5/18 (2013.01) [G01S 3/8022 (2013.01); G01S 5/30 (2013.01); G01S 11/14 (2013.01); H04B 11/00 (2013.01); G01S 3/8086 (2013.01); G01S 15/8977 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a mobile communication device, comprising:
receiving one or more acoustic signals from a transmitting device;
storing a plurality of signature templates;
sampling the one or more acoustic signals to generate sampled acoustic signals,
cross-correlating the sampled acoustic signals with at least one of the plurality of signature templates in a frequency domain to determine a Doppler shift frequency of the sampled acoustic signals;
shifting the sampled acoustic signals in the frequency domain by the Doppler shift frequency;
de-convolving the shifted sampled acoustic signals to generate a response function;
performing a peak analysis on the response function to identify valid peaks and identifying one or more signature templates from the plurality of signature templates using the identified valid peaks; and
determining a location of the mobile communication device based on the identified valid peaks.