US Patent No. 10,598,762

LPD DESCRIPTOR WORD BASED GEOLOCATION


Patent No. 10,598,762
Issue Date March 24, 2020
Title Lpd Descriptor Word Based Geolocation
Inventorship Thomas R. Giallorenzi, Sandy, UT (US)
Radivoje Zarubica, Sandy, UT (US)
N. Thomas Nelson, Spanish Fork, UT (US)
Philip M. Hirz, Holladay, UT (US)
Andrew L. Nelson, Salt Lake City, UT (US)
Assignee L3 Technologies Inc., New York, NY (US)

Claim of US Patent No. 10,598,762

1. A method of geolocating an emitter of a low probability of detection (LPD) signal being transmitted from the emitter in an environment with a noise floor, where the LPD signal is below the noise floor, the method comprising:at a sensor node, receiving a version of the LPD signal from the emitter;
for the version of the LPD signal, performing cyclostationary feature detection of the version of the LPD signal, including detecting at least one of a chip rate of the version of the LPD signal, a hop rate of the version of the LPD signal, or a carrier frequency of the version of the LPD signal;
creating a low probability of detection descriptor word, wherein the low probability of detection descriptor word includes frequency feature of the version of the LPD signal; and
providing the low probability of detection descriptor word to a data processor, where the data processor is configured to use a plurality of low probability of detection descriptor words from different sensor nodes for different versions of the LPD signal to geolocate the emitter.