Systems and methods for simulating performance of receivers in realistic interference scenarios

Abstract

Systems and methods for simulating performance of receivers in realistic interference scenarios are provided herein. A method for simulating the performance of a receiver may include (a) generating a set of observables that a receiver in a truth state would ideally see; (b) adding interference to the set of observables to generate a set of corrupted observables; and (c) generating a position, navigation, and timing (PNT) solution using the set of corrupted observables.

What is claimed is: 
     
         1 . A method for simulating the performance of a receiver, the method comprising:
 (a) generating a set of observables that a receiver in a truth state would ideally see;   (b) adding interference to the set of observables to generate a set of corrupted observables; and   (c) generating a position, navigation, and timing (PNT) solution using the set of corrupted observables.   
     
     
         2 . The method of  claim 1 , wherein the truth state comprises one or more of a position, geometry, kinematics, and dynamics of the receiver. 
     
     
         3 . The method of  claim 2 , wherein the truth state further comprises one or more of a position, geometry, kinematics, and dynamics of one or more transmitters. 
     
     
         4 . The method of  claim 1 , wherein the truth state comprises a previous PNT solution of the receiver. 
     
     
         5 . The method of  claim 1 , wherein generating the set of observables comprises applying a signal transmission model to the truth state. 
     
     
         6 . The method of  claim 5 , wherein the signal transmission model comprises a global positioning system (GPS) constellation model, a Galileo constellation model, a GLONASS constellation model, or a Doppler orbitography and radiopositioning integrated by satellite (DORIS) constellation model. 
     
     
         7 . The method of  claim 1 , wherein the set of observables comprises one or more of: pseudorange, range, time-delay-of-arrival (TDOA), navigation data, carrier phase, code phase, Doppler, and signal-to-noise ratio (SNR). 
     
     
         8 . The method of  claim 1 , wherein adding interference to the set of observables comprises applying a signal disruption model to the set of observables. 
     
     
         9 . The method of  claim 8 , wherein the signal disruption model applies one or more errors selected from the group consisting of simulated unintentional interference, jamming, and spoofing, to the set of observables. 
     
     
         10 . The method of  claim 9 , wherein one or more of the errors are scaled or correlated based on the truth state. 
     
     
         11 . The method of  claim 9 , further comprising validating the errors against actual receiver hardware. 
     
     
         12 . The method of  claim 1 , wherein generating the PNT solution comprises applying a receiver model to the set of corrupted observables. 
     
     
         13 . The method of  claim 12 , further comprising:
 outputting the PNT solution to a simulation of a vehicle;   producing a new truth state based on the simulation of the vehicle; and   repeating steps (a) through (c) using the new truth state.   
     
     
         14 . The method of  claim 1 , further comprising using the PNT solution to validate that flight software will function as expected under a possible flight condition. 
     
     
         15 . A system for simulating the performance of a receiver, the system comprising a processor and a computer-readable medium storing instructions for causing the processor to perform operations including:
 (a) implementing a signal transmission model to generate a set of observables that a receiver in a truth state would ideally see;   (b) implementing a signal disruption model to add interference to the set of observables to generate a set of corrupted observables; and   (c) implementing a receiver model to generate a position, navigation, and timing (PNT) solution using the set of corrupted observables.   
     
     
         16 . The system of  claim 15 , wherein the truth state comprises one or more of a position, geometry, kinematics, and dynamics of the receiver. 
     
     
         17 . The system of  claim 16 , wherein the truth state further comprises one or more of a position, geometry, kinematics, and dynamics of one or more transmitters. 
     
     
         18 . The system of  claim 15 , wherein the truth state comprises a previous PNT solution of the receiver. 
     
     
         19 . The system of  claim 15 , wherein the signal transmission model comprises a global positioning system (GPS) constellation model, a Galileo constellation model, a GLONASS constellation model, or a Doppler orbitography and radiopositioning integrated by satellite (DORIS) constellation model. 
     
     
         20 . The system of  claim 15 , wherein the set of observables comprises one or more of: pseudorange, range, time-delay-of-arrival (TDOA), navigation data, carrier phase, code phase, Doppler, and signal-to-noise ratio (SNR). 
     
     
         21 . The system of  claim 15 , wherein the signal disruption model applies one or more errors selected from the group consisting of simulated unintentional interference, jamming, and spoofing, to the set of observables. 
     
     
         22 . The system of  claim 21 , wherein one or more of the errors are scaled or correlated based on the truth state.