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In this paper, we investigate multi-message authentication to combat adversaries with infinite computational capacity. An authentication framework over a wiretap channel (W_1, W_2) is proposed to achieve information-theoretic security with the same key. The proposed framework bridges the two research areas in physical (PHY) layer security: secure transmission and message authentication. Specifically,...
This paper proposes a Weighted fractional Fourier transform (WFRFT) based cooperation scheme to improve PHY layer security against eavesdropping in wireless communications. Rather than dissipating valuable transmission power to jam the eavesdropper, by leveraging the features of WFRFT, the information bearing signal can create “Artificial Noise” effect at the eavesdropper while imposing no effect...
Exploiting physical layer (PHY) characteristics has great potential to complement and secure upper-layer authentication protocols. Unlike existing PHY authentication mechanisms requiring special hardware designs, in this paper, we propose a practical PHY- aided authentication approach based on weighted fractional Fourier transform (WFRFT). Instead of exploiting the channel or hardware characteristics...
In this paper, an opportunistic channel access for cognitive radio networks (CRNs) with multiple channels is proposed, whereby the secondary users (SUs) cooperate with primary users (PUs) to improve the latter's throughput and gain transmission opportunities in return. Cooperation on single channel is studied first, which is modeled by the Stackelberg game. By analyzing the game, the access time allocation...
The identifiability of local oscillator phase perturbation self-calibration in multiple-input multiple-output (MIMO) radar is analyzed in this paper. There are four cases, the absolute phase perturbation (APP) and phase perturbation difference (PPD) in MIMO radar with widely separated antennas (SMIMOR), the APP and PPD in co-located MIMO radar (CMIMOR), discussed in this paper. The hybrid Cramér-Rao...
In this paper, we investigate cooperative networking in cognitive radio networks (CRNs), which targets to help the primary users (PUs) for secure communications and provide transmission opportunities to secondary users (SUs). Two cooperation schemes: relay-jammer (R-J) scheme and cluster-beamforming (C-B) scheme, are proposed. In R-J cooperation scheme, two individual SUs, a relay and a friendly jammer,...
A wireless sensor network consists of a huge number of sensor nodes with limited battery power, which are deployed over a certain geographical area for monitoring the activities of the targets and reporting the information to the sink node. Now that the energy supplying is limited and cannot be replaced freely, the network must minimize the energy consumption in order to prolong the span of the network...
A CMOS heterodyne receiver integrating a phase-locked loop that includes a bulk of transmitter functions for W-band pulsed radar is realized using low leakage transistors of a low cost 65-nm bulk CMOS process with 5 thin and 1 thick metal layers used to manufacture cell phone RFIC's. The peak conversion gain of receiver is 7 dB and the minimum NF is 10.8 dB between 78 and 88 GHz in measurement. The...
Current Digital Rights Management (DRM) systems permit a consumer to buy a digital license to access the corresponding content on his device. Under these current systems, however, the consumer is unable to resell the license.To allow the consumer to resell the license, all entities involved in the reselling process must be treated fairly. Fairness means that a reseller should obtain payment if and...
In this paper, we consider blind interference suppression in IR UWB communication system, and the means of a statistical technique called independent component analysis (ICA), taken as a solution for the coexistence of impulse-radio Ultra-wideband (IR-UWB) systems with other wireless systems was studied. Particularly for the evaluation of the system performance, tone, multiton, and partial-band interference...
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