US 12,436,278 B2
Method and system for mapping a region
Arnoud Marc Jongsma, Leidschendam (NL); and Vsevolod Olegovych Kovalenko, Leidschendam (NL)
Assigned to FNV IP B.V., Leidschendam (NL)
Appl. No. 18/562,802
Filed by FNV IP B.V., Leidschendam (NL)
PCT Filed May 20, 2022, PCT No. PCT/NL2022/050280
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/245217, PCT Pub. Date Nov. 24, 2022.
Claims priority of application No. 2028276 (NL), filed on May 21, 2021.
Prior Publication US 2024/0241252 A1, Jul. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 15/89 (2006.01); G01S 7/536 (2006.01); G01S 15/00 (2020.01); G01S 15/32 (2006.01)
CPC G01S 15/8904 (2013.01) [G01S 7/536 (2013.01); G01S 15/003 (2013.01); G01S 15/325 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for mapping a target region of a space that comprises a plurality of portions with signal scatterers, the method comprising:
providing a signal transmitter and a signal receiver within signal range of the signal transmitter;
moving at least one of the signal transmitter and the signal receiver along a respective trajectory relative to the target region;
continuously transmitting, with the signal transmitter, a probing signal towards the target region;
continuously receiving, with the signal receiver, a response signal composed of a plurality of signal components that result from scattering of the probing signal by respective ones of the plurality of portions of the target region;
during the transmitting and receiving, repeatedly determining instantaneous positions of the moving at least one of the signal transmitter and receiver;
transforming the probing signal into a plurality of test signals, each test signal being associated with a signal propagation path via a selected portion of the target region, wherein the probing signal comprises a time sequence of noise with a predefined bandwidth; and
correlating each of the plurality of test signals with the response signal in a time domain, to generate a map of correlation strength values associated with the selected portions of the target region, wherein the transforming of the probing signal for each selected portion of the target region comprises:
calculating a total delay time based on a propagation speed within a signal carrying medium and on a propagation distance from a first instantaneous position of the signal transmitter at a time that the probing signal was transmitted, towards the selected portion where the probing signal was scattered, and further towards a second instantaneous position of the signal receiver at a time the response signal was received, wherein the determined instantaneous positions comprise the first and the second instantaneous positions; and
shifting parts or all of the probing signal in time, by correcting for the calculated total delay time, to obtain the test signal associated with the selected portion of the target region.