Privacy Rate
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Lee, Seonwoo
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Abstract
In some situations, a user would like to communicate without detection. It has been shown that it is impossible to achieve positive rate while remaining undetectable to a third party. However, that work assumes that the detector is certain about their own noise power, which inherently has uncertainty because that knowledge is based on a measurement. By exploiting this uncertainty the transmitter can achieve a positive rate while remaining undetectable to a third party. This positive rate is quantified in numerous scenarios: Single Input Single Output (SISO) Additive White Gaussian Noise (AWGN) and Rayleigh channels (with channel state information (CSI) and channel distribution information (CDI)), and Multiple Input Multiple Output (MIMO) Rayleigh channels. Finally, building on previous work, it is shown that for a detector to lower their maximum possibility of an error, they should not take as many samples as possible–a counterintuitive result. This is explained in more detail in the last chapter.
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2021-08-02
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Thesis