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We study the semi-coherent detection of a novel communication mechanism, ambient backscatter, where detection-required parameters can be obtained from unknown data symbols and a few pilot symbols. To release dependence on prior knowledge of ambient signals, we propose a type of robust design, called energy detector, with the ambient signal being either complex Gaussian (CG) or phase shift keying (PSK)...
Ambient backscatter system (ABS) is a newly rising communication mechanism which enables battery-free devices to communicate with each other. Based on the ABS model, we use the energy detection method to detect the information bits transmitted from tag under the unknown source. It is known that for an ambient source with complex constellation, the outage probability of the asymptotic bit error rate...
To overcome the drawback of premature convergence of standard particle swarm optimization (PSO) especially when solving high-dimension functions, this paper provided a modified particle swarm optimization(MPSO) based on optimum-selecting by probability and explosive searching strategy. In each iteration, every particle selects individual gbest with optimum-selecting by probability and takes explosive...
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