SYSTEM AND METHOD FOR TRANSMITTING COVERT WIRELESS SIGNALS WITHIN AN OVERT WIRELESS SIGNAL TRANSMISSION
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United States of America Patent
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Issued Date -
Mar 16, 2023
app pub date -
Sep 15, 2022
filing date -
Sep 15, 2021
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Abstract
A system and method for transmitting, from an encoder to a decoder, one or more covert wireless signals within an overt wireless signal. The encoder receives a bitstream and encodes the received bitstream into an encoded noise signal that replicates a noise signal of a predetermined hardware device. The encoded noise signal is then combined with a cover modulated signal to form at least one covert wireless signal that is distinct from and conceals the received bitstream. The covert wireless signal is transmitted within an overt wireless signal to a decoder that receives the covert wireless signal, removes the cover modulated signal from the received covert wireless signal to isolate the encoded noise signal, and then converts the isolated encoded noise signal into a decoded bitstream. The covert wireless signal can be a plurality of carrier signals, optionally established through orthogonal frequency-division multiplexing (OFDM) or quadrature amplitude modulation (QAM).
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