Physical layer authentication in MIMO systems: a carrier frequency offset approach.

By exploiting the carrier frequency offset (CFO) between a transmitter-receiver pair, this paper proposes a CFO-based physical layer authentication scheme for dynamic multiple-input-multiple-output (MIMO) systems. We first provide analytical modeling of dynamic CFO in such MIMO systems by jointly taking into account the intrinsic oscillator mismatch and Doppler frequency shift caused by node mobility, and employ the self-correlating and extended Kalman filtering techniques for the CFO estimation and prediction. By quantizing the difference between the estimated CFO and predicted one, we then apply the statistical signal processing techniques to develop a CFO-based physical layer authentication scheme for transmitter identity verification. With the help of tools from stochastic process and hypothesis testing theories, we further derive the analytical expressions for false alarm rate as well as detection rate to evaluate the performance of the proposed scheme. Finally, we provide extensive numerical results to demonstrate the efficiency of the proposed scheme. [ABSTRACT FROM AUTHOR]