SYSTEM AND METHOD FOR ROBUST NAVIGATION AND GEOLOCATION USING MEASUREMENTS OF OPPORTUNITY
First Claim
Patent Images
1. A method of locating an agent, comprising the steps of:
- a. surveying the RF environment by monitoring a range of RF frequencies;
b. receiving a plurality of RF signals at an agent;
c. performing ranging measurements on the received RF signals;
c. classifying the received RF signals according to a predetermined criteria of parameters;
d. ranking the classified received RF signals; and
e. determining a location of the agent as a function of the performed ranging measurements and the ranking of the received signals;
wherein the RF received signals include at least one synchronized signal and at least one and unsynchronized signal.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method to opportunistically capture and use measurements on a priori unknown radio signals, not intended for radio navigation or geolocation, to improve navigation/geolocation position estimation yield and accuracy.
-
Citations
17 Claims
-
1. A method of locating an agent, comprising the steps of:
-
a. surveying the RF environment by monitoring a range of RF frequencies; b. receiving a plurality of RF signals at an agent; c. performing ranging measurements on the received RF signals; c. classifying the received RF signals according to a predetermined criteria of parameters; d. ranking the classified received RF signals; and e. determining a location of the agent as a function of the performed ranging measurements and the ranking of the received signals; wherein the RF received signals include at least one synchronized signal and at least one and unsynchronized signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of locating an agent, comprising the steps of:
-
a. performing an initialization step to determine the location of a first transmitter of a signal of opportunity (SoOP), comprising; (i) surveying the RF environment by monitoring a range of RF frequencies using a first plurality of agents, each agent having a receiver and having a coarse location (ii) receiving a plurality of SoOPs at each agent; (iii) at each agent, making a ranging measurement for a first SoOP; (iv) at a first agent, receiving the ranging measurement for the first SoOP from a plurality of agents (v) at a first agent, determining the location of the first transmitter associated with the first SoOP as a function of the ranging measurements for the first SoOP; (b) performing a mapping step to determine the location of a second agent, comprising. (i) surveying the RF environment by monitoring for a range of RF frequencies using a second plurality of agents, each agent having a receiver and including a second agent at an unknown location; (ii) receiving a second SoOPs at each agent of the second plurality of agents; (iii) at each agent, making a timing measurement for the second SoOP; (iv) at the second agent, receiving the timing measurement for the second SoOP from the second plurality of agents; and (v) at the second agent, determining the location of the second agent as a function of (a) the timing measurements for the second SoOP, and (b) and the determined location of the first transmitter. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A method of locating an agent, comprising the steps of:
-
a. surveying the RF environment by monitoring a range of RF frequencies transmitted; b. receiving a first plurality of RF signals at an agent at a first coarse location; wherein at least one of the first plurality of received signals is transmitted from a transmitter of unknown location; c. performing ranging measurements on the first plurality of received RF signals; d. receiving a second plurality of RF signals at the agent at a second coarse location, wherein at least one of the second plurality of received signals is transmitted from a transmitter of unknown location; e. performing ranging measurements on the second plurality of received RF signals; and f. determining a location of the agent as a function of the performed ranging measurements of the first and second plurality of received RF signals; wherein the first and second plurality of received RF signals include at least one synchronized signal and at least one and unsynchronized signal. - View Dependent Claims (17)
-
Specification