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US 12,438,594 B2Granted
Method and apparatus for improving co-channel operation of independent radio systems
AssigneeFocal Point Positioning Limited
InventorsRamsey Michael Faragher, Robert Mark Crockett, Peter James Duffett-Smith
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Abstract
A method, apparatus and system for improving co-channel operation of simultaneously operating, independent radio signals. The method, apparatus and system receive at least two co-channel RF signals, perform motion compensated correlation upon at least one of the at least two co-channel RF signals, and determine the direction of arrival of the at least one of the at least two co-channel RF signals. In response to the direction of arrival determined for the at least one of the at least two co-channel RF signals, an action to perform to improve co-channel operation of the at least two co-channel RF signals at a subject receiver is determined.
Claims20
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.
6 more elements
An apparatus for improving co-channel operation of independent radio signals, comprising:
- at least one processor and at least one memory for storing programs and instructions that, when executed by the at least one processor, causes the apparatus to perform operations comprising:
- correlating at least one local signal with at least one of at least two co-channel radio frequency (RF) signals received at an antenna of a subject receiver to generate at least one 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.
6 more elements
A system for improving co-channel operation of independent radio signals, comprising:
- a subject receiver comprising at least one antenna;
- a first source of at least one first radio frequency (RF) signal;
- a local, second source of at least one second RF signal;
- and
- an apparatus comprising at least one processor and at least one memory for storing programs and instructions that, when executed by the at least one processor, causes the apparatus to perform operations comprising:
- correlating at least one local signal with at least one of at least one first RF signal from the first source or at least one second RF signal from the second source received at the antenna of the subject receiver to generate at least one 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 at least one first RF signal or the at least one second RF signal with respect to the antenna;
- compensating a phase of at least one of the at least one local signal, the at least one of the at least one first RF signal or the at least one second RF signal 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 at least one first RF signal or the at least one second RF signal 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 at least one first RF signal or the least one second RF signal, an action to perform to improve co-channel operation of the at least one first RF signal and the at least one second RF signal at the subject receiver.
10 more elements
Dependencies are inferred from the claim text.