Achieving Undetectable Communication

作者：Lee Seonwoo^*; Baxley Robert J; Weitnauer Mary Ann; Walkenhorst Brett

来源：IEEE Journal of Selected Topics in Signal Processing, 2015, 9(7): 1195-1205.

DOI：10.1109/JSTSP.2015.2421477

• Low probability of detection communication
• covert communication
• multiple input-multiple output (MIMO)
• signal-to-noise ratio (SNR) wall
• noise uncertainty
• radiometer

In this paper we consider the problem of achieving a positive error-free communications rate without being detected by an eavesdropper-we coin this the privacy rate. Specifically, we analyze the privacy rate over additive white Gaussian Noise (AWGN) channels with finite and infinite number of samples and Rayleigh single input-single (SISO) and multiple input-multiple output (MIMO) channels with infinite samples when an eavesdropper employs a radiometer detector and has uncertainty about his noise variance. Leveraging recent results on the phenomenon of a signal-to-noise ratio (SNR) wall when there is eavesdropper noise power measurement uncertainty, we show that a nonzero privacy rate is possible. We also show that in this scenario, the detector should not necessarily take as many samples as possible.

• 出版日期2015-10