| 摘要 |
A method for increasing accuracy of geolocation based on timing measurements of RF signals. The method includes: (a) receiving at a user one or more RF signals transmitted over time, (b) correlating the received signals with a plurality of replica waveforms, (c) creating a first set of estimates of the time or arrivals of the signals at the user, (d) using the first set of estimates to create a plurality of models, wherein each model assumes that some of the measurements are affected by multipath or interference, (e) testing the models to estimate the likelihood of timing measurements for each model, and (f) determining the set of LOS measurements as one associated with a model having the largest likelihood. |
| 主权项 |
1. A method to increase accuracy of geolocation of a user device based on timing measurements of RF signals, the method comprising:
(a) receiving, at a user device, one or more RF signals transmitted over time from a transmitter; (b) correlating, at the user device, the received signals with a plurality of replica waveforms; (c) creating, at the user device, a first set of estimates of times of arrival of the received signals at the user device; (d) using the first set of estimates to create a plurality of models at the user device, wherein each model assumes at least one of the first set of estimates is affected by multipath or interference; (e) processing, at the user device, the plurality of models to estimate the likelihood of times of arrival for each model; (f) determining, at the user device, a set of line of sight (LOS) measurements for the user device using a model having the largest likelihood; (g) determining, at the user device, a location of the user device as a function of the determined set of LOS measurements. |
