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.
Limits of reliable communication with low probability of detection on AWGN channels,
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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.