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The reciprocity of the wireless and the randomness of channel characteristic is the basis of physical layer key generation technology based on the channel. The complete key generation technologies include five steps that channel probing, channel feature extraction, quantification, reconciliation and privacy application. There are many theories and simulation prove the feasibility of key extraction...
In this paper a physical layer authentication method is proposed to suit to time-variant wireless channels by taking advantage of the varied mutually orthogonal basis functions and the constant basis coefficients to approximate the state of separable paths, in which each sampling values of separable paths is related within a block transmission time in time-variant channels. Simulation experiments...
Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technology. It has great spectrum efficiency, strong anti-interference ability and relatively simple system structure. Orthogonal frequency division multiplexing has become one of the key technologies of 4G and the next wireless communication generation. Traditional stream cipher encryptions are usually performed by...
Discrete fractional Fourier transform (DFRFT) is a generalization of discrete Fourier transform. There are a number of DFRFT proposals, which are useful for various signal processing applications. This paper investigates practical solutions toward the construction of unconditionally secure communication systems based on DFRFT via cross-layer approach. By introducing a distort signal parameter, the...
In this paper, we introduce a novel framework for physical layer assisted message authentication (PAA) under public key infrastructure (PKI) in vehicular communication networks. The proposed framework takes advantage of temporal and spatial uniqueness in physical layer channel responses for each transmission pair, in which a trust between two vehicles can be maintained by comparing the current estimated...
A coding scheme for concatenation space-time codes to achieve the maximum diversity over the time-selective block Rayleigh fading channels via the time-frequency duality is proposed in this paper. Based on the basis expansion model (BEM) for the time-selective fading channels, we firstly inversely convert it into the corresponding virtual frequency-selective fading circulant matrix by pre- and post-multiplying...
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