First experimental RF demonstration of square-root-law covert communication, implemented with sparse-coded BPSK on USRP X310 radios, keeps the warden's error near 0.5 while Bob's raw symbol error is about 0.17.
Hiding information in noise: Fundamental limits of covert wireless communication,
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Experimental Covert Communication Using Software-Defined Radio
First experimental RF demonstration of square-root-law covert communication, implemented with sparse-coded BPSK on USRP X310 radios, keeps the warden's error near 0.5 while Bob's raw symbol error is about 0.17.