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Traditional cryptographic secret key establishment mechanisms are facing challenges with the fast growth of high-performance computing, and can be very costly in many settings, e.g. in wireless ad-hoc networks, since they consume scarce resources such as bandwidth and battery power. As an alternative, link-signature-based (LSB) secret key extraction techniques have received many interests in recent...
The performance of an underlay cognitive radio network equipped with multiple decode-and-forward relays is investigated in the presence of multiple primary transmitters and multiple primary receivers. The allowed maximum transmission powers for the secondary nodes are obtained according to the outage constraint of multiple primary users (PUs). The authors study selective cooperation scheme for the...
Digital switching-mode power amplifiers (PA) based on bit-stream modulations such as Delta Sigma Modulations (DSM) have been studied as a potential solution to overcome the trade-off between the power efficiency and the signal linearity of RF PAs. FIR filtering has been introduced to suppress the quantization noise near signal band for those transmitters based on a combination of multiple power amplifiers...
Cognitive-radio-networks with multiple input multiple output is an effective method to improve spectrum efficiency. Linear pre-coders is a crucial technology to realize this goal. However, most of existing algorithm developed based on the Gaussian input assumption. This assumption limited the application of linear precoding and caused great performance loss. In this paper, for such a problem, a linear...
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