Sparse signaling over bosonic channels minimizes detectability with a two-consecutive-photon-number mixture (vacuum plus single photon at low brightness), revealing power thresholds that trade covertness against communication and sensing rates.
Covert communication over noisy channels: A resolv- ability perspective
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For partially-connected DMCs the achievable Stein exponent under covertness equals the non-covert exponent with sublinear noise-free bits; for fully-connected DMCs an achievable exponent improving on local testing is proposed.
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Covert Signaling for Communication and Sensing over the Bosonic Channels
Sparse signaling over bosonic channels minimizes detectability with a two-consecutive-photon-number mixture (vacuum plus single photon at low brightness), revealing power thresholds that trade covertness against communication and sensing rates.
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Distributed Hypothesis Testing Under A Covertness Constraint
For partially-connected DMCs the achievable Stein exponent under covertness equals the non-covert exponent with sublinear noise-free bits; for fully-connected DMCs an achievable exponent improving on local testing is proposed.