Method of frequency encoding beacons for dismounted identification, friend or foe
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsHermanus S. Pretorius, Aaron W. Bennett, Jeffrey L. Jew, Ryan Bruce Zielinski
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Abstract
The system and method for frequency encoded beacons for use in covert dismount identification, friend or foe and communications. Waveforms are capped at thresholds below human and conventional night vision detection. Waveforms are further modulated to identify dismounts as well as other information such as day and time, rank, health status, and the like. The beacons may operate at different wavelengths depending on whether they are used on ground, in air, or at sea.
Claims18
A system for covert frequency encoded beacons, comprising:
- a transmitter portion comprising,
- a transmitter master dock;
- a beacon configured to generate a covert output signal, wherein the output signal from the beacon is at a wavelength greater than or equal to 700 nm;
- and
- a modulation module configured to modulate the output signal from the beacon to produce an encoded output signal, wherein the encoded output signal has a repetition frequency greater than 60 Hz and a duty cycle underneath detectable levels of power required by the aided eye, the duty being a fraction of one percent;
- and
- a receiver portion comprising,
- a receiver master dock,
- a detector configured to detect the encoded output signal;
- and
- a demodulation module configured to demodulate the encoded output signal and decode the encoded output signal.
A system for frequency encoded beacons for use in covert dismount identification, friend or foe, comprising:
- a receiver portion comprising,
- a receiver master clock;
- a detector configured to detect an encoded output signal from a beacon, wherein the encoded output signal has a repetition frequency greater than 60 Hz, a duty cycle underneath detectable levels of power required by the aided eye and being a fraction of one percent, and utilizes radio frequency (RF) spread spectrum communication;
- and
- a demodulation module configured to demodulate the encoded output signal from the beacon to decode the encoded output signal.
A method for frequency encoding covert beacons, comprising:
- generating an output signal via a beacon, wherein the output signal from the beacon is at a wavelength greater than or equal to 700 nm;
- modulating the output signal from the beacon, via a modulation module, and encoding the output signal to produce an encoded output signal, wherein the encoded output signal has a repetition frequency greater than 60 Hz and a duty cycle underneath detectable levels of power required by the aided eye, the duty cycle being a fraction of one percent;
- detecting, via a detector, the encoded output signal;
- demodulating the encoded output signal, via a demodulation module, and decoding the encoded output signal to produce a decoded output signal;
- and
- communicating to a user the decoded output signal.
Dependencies are inferred from the claim text.