US 12,438,594 B2
Method and apparatus for improving co-channel operation of independent radio systems
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 May 17, 2023, as Appl. No. 18/198,591.
Claims priority of provisional application 63/343,382, filed on May 18, 2022.
Claims priority of application No. PCT/GB2023/051243 (WO), filed on May 11, 2023.
Prior Publication US 2023/0412245 A1, Dec. 21, 2023
Int. Cl. H04B 7/08 (2006.01); H04B 7/06 (2006.01)
CPC H04B 7/086 (2013.01) [H04B 7/0617 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for improving co-channel operation of independent radio signals, comprising:
receiving at least two co-channel radio frequency (RF) signals at an antenna of a subject receiver;
correlating at least one local signal with at least one of the received at least two co-channel RF signals to generate at least one respective correlation result;
determining a motion of the antenna of the subject receiver;
generating a plurality of phasors, where each phasor represents a hypothesis comprising a signal phase related to a relative direction of motion of the at least one of the received at least two co-channel RF signals with respect to the antenna;
compensating a phase of at least one of the local signal, the at least one of the received at least two co-channel RF signals or the at least one correlation result based on the generated plurality of phasors to determine at least one phase-compensated correlation result;
identifying a phasor in the plurality of phasors that optimizes the at least one phase-compensated correlation result;
determining a direction of arrival for the at least one of the received at least two co-channel RF signals using the identified phasor that optimizes the at least one phase-compensated correlation result; and
determining, from the determined direction of arrival for the at least one of the received at least two co-channel RF signals, an action to perform to improve co-channel operation of the received at least two co-channel RF signals at the subject receiver.