IMPROVED OFDM RANGING USING POSITION REFERENCE SYMBOL PHASE
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United States of America Patent
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Issued Date -
Sep 8, 2022
app pub date -
Aug 24, 2020
filing date -
Aug 23, 2019
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Abstract
Improved approaches for use of RF signals (e.g., OFDM signals) for determining a range that can be used for geolocation of a device. The disclosure includes systems and methods that may allow for transition from a correlation approach to a group delay approach. In addition, upon detection of the presence of multipath error in a signal, a signal bandwidth may be increased to as to include additional position reference symbols (PRS) that are included in a determination of a propagation delay, and in turn, a range. In addition, use of a different number of symbols in a signal based on signal SNR is presented.
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