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US 10,650,689 B2Granted
Waveform authentication system and method
AssigneeThe MITRE Corporation
InventorDaniel Sinkiewicz
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to systems and methods to add information to an existing waveform. Specifically, the systems and methods described herein can add watermark information using transmitted-reference to a legacy waveform without actually controlling the legacy waveform itself.
Claims18
A system, comprising:
- a radio transmitter that transmits a radio signal;
- a watermark transmitter that adds watermark information to the radio signal based on applying a synthetic multipath channel to a copy of the radio signal to generate an echo signal and transmitting a composite radio signal comprising the echo signal added to the radio signal, wherein the watermark transmitter is configured to apply the synthetic multipath channel by:
- selecting a delay and a scale based on a specific value of the watermark information to be embedded,
- delaying the copy of the radio signal by the selected delay, and
- scaling the copy of the radio signal by the selected scale, wherein the delayed and scaled copy of the radio signal corresponds to the echo signal embedding the specific value of the watermark information;
- a watermark receiver that receives the composite radio signal comprising the watermark information, wherein the watermark receiver can decode the watermark information;
- and
- a radio receiver that receives the decoded radio signal.
5 more elements
A method, comprising:
- transmitting a radio signal;
- adding watermark information to the radio signal based on applying a synthetic multipath channel to a copy of the radio signal to generate an echo signal, wherein applying the synthetic multipath channel comprises:
- selecting a delay and a scale based on a specific value of the watermark information to be embedded,
- delaying the copy of the radio signal by the selected delay, and
- scaling the copy of the radio signal by the selected scale, wherein the delayed and scaled copy of the radio signal corresponds to the echo signal embedding the specific value of the watermark information;
- transmitting a composite radio comprising the echo signal added to the radio signal;
- receiving the composite radio signal comprising watermark information;
- decoding the watermark information;
- and
- receiving the decoded radio signal.
7 more elements
Dependencies are inferred from the claim text.