Invention Publication
- Patent Title: METHOD AND APPARATUS THAT USES RADIO TRANSMISSIONS FOR SURFACE MAPPING
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Application No.: US18371915Application Date: 2023-09-22
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Publication No.: US20240103118A1Publication Date: 2024-03-28
- Inventor: Ramsey Michael FARAGHER , Robert Mark Crockett , Peter James Duffett-Smith
- Applicant: Focal Point Positioning Limited
- Applicant Address: GB Cambridge
- Assignee: Focal Point Positioning Limited
- Current Assignee: Focal Point Positioning Limited
- Current Assignee Address: GB Cambridge
- Main IPC: G01S5/02
- IPC: G01S5/02

Abstract:
A method for mapping a surface using signals transmitted from a single transmitter comprises: receiving signals transmitted from the single transmitter, where each signal has a different propagation path; determining a motion of an antenna of the receiver; generating phasor sequences, where each phasor sequence represents a hypothesis based on antenna motion and a direction of arrival estimate for each received signal; compensating the received signals, local signals, or correlation results from correlating the received signals with the local signals using the phasor sequences based on the hypotheses to generate compensated correlation results; determining a preferred hypothesis in the hypotheses for each received signal that optimizes each correlation result; identifying a direction of arrival for each received signal using the determined hypothesis; determining a point of reflection from the direction of arrival of each received signal; and combining the points of reflection into one or more reflective surfaces.
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