US 12,436,297 B2
Method, system and computer program product for performing correlation in a positioning system
Ramsey Michael Faragher, Cambridge (GB); Robert Mark Crockett, Cambridge (GB); and Peter James Duffett-Smith, Cambridge (GB)
Assigned to FOCAL POINT POSITIONING LIMITED, Cambridge (GB)
Filed by Focal Point Positioning Limited, Cambridge (GB)
Filed on Sep. 19, 2022, as Appl. No. 17/947,911.
Application 17/947,911 is a continuation in part of application No. PCT/GB2021/050692, filed on Mar. 19, 2021.
Prior Publication US 2023/0009945 A1, Jan. 12, 2023
Int. Cl. G01S 19/42 (2010.01); G01S 19/21 (2010.01); G01S 19/26 (2010.01)
CPC G01S 19/428 (2013.01) [G01S 19/21 (2013.01); G01S 19/26 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method performed in a positioning system, comprising:
receiving, at a receiver, a signal from one or more remote sources;
determining motion of the receiver;
determining a first direction, wherein signals received at the receiver along the first direction are desired to be enhanced;
determining a second direction, wherein signals received at the receiver along the second direction are desired to be suppressed;
obtaining first and second phasor sequences indicative of the motion of the receiver in the first and second directions respectively;
generating a third phasor sequence based on a weighted combination of the first and second phasor sequences;
providing a local signal; and
providing a correlation signal using the third phasor sequence, wherein providing the correlation signal comprises correlating the local signal with the received signal, and combining the result of the correlation with the third phasor sequence, such that a signal received along the second direction is suppressed relative to a signal received along the first direction.