Transmitting an analog Gaussian source over a Gaussian wiretap channel under SNR mismatch

Details Transmitting an analog Gaussian source over a Gaussian wiretap channel under SNR mismatch Transmitting an analog Gaussian source over a Gaussian wiretap channel under SNR mismatch

2009-08-15

arxiv.org/abs/0908.2203v1

Computer Science

Information Theory

6 pages and 3 figures

Scientific paper

In this work we study encoding/decoding schemes for the transmission of a discrete time analog Gaussian source over a Gaussian wiretap channel. The intended receiver is assumed to have a certain minimum signal to noise ratio (SNR) and the eavesdropper is assumed to have a strictly lower SNR compared to the intended receiver. For a fixed information leakage to the eavesdropper, we are interested in minimizing the distortion in source reconstruction at the intended receiver, and we propose joint source channel coding (JSCC) schemes for this setup. For a fixed information leakage to the eavesdropper, we also show that the schemes considered give a graceful degradation of distortion with SNR under SNR mismatch, i.e., when the actual channel SNR is observed to be different from the design SNR.

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