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Wireless mesh networks (WMNs) cannot utilize the full capability of these radio technologies without an effective channel assignment algorithm. Existing metrics for characterising the efficacy of channel assignment algorithms poorly reflect the goodput distribution in WMNs. In this paper, we develop a fitness evaluation algorithm that feeds back several indicators of efficacy to a channel assignment...
Wireless sensor networks for rarely occurring critical events must maintain sensing coverage and low latency network connectivity to ensure event detection and subsequent rapid propagation of notification messages. Existing geographic forwarding algorithms have proved successful in providing energy efficient network connectivity for arbitrary topologies where sensing coverage is not guaranteed. This...
In this work, we present a CMOS image sensor for star centroid measurement in star trackers. The analysis of the star tracker system shows that long integration will cause "tail effect" in the star image. It significantly reduces the signal magnitude, which in turn increases the centroiding errors. In order to capture limited photons generated from dim stars within shortened integration...
Chirp signals are transmitted by Synthetic Aperture Radar (SAR) and the received signals are sampled into Inphase and Quadrature components which are so-called raw SAR data. The data is so tremendous that it brings extraordinarily high burden to the on-board storage and downlink bandwidth. This paper addresses a new process of the raw SAR data by sampling the data below Nyquist rate in terms of Compressive...
The matching of sensor and weapon system is important for the whole combat system. Combat system would have the optimum efficacy only if the indexes of sensor and weapon system attained to the best matching status. A method of optimization matching of sensor and weapon system based on geometric programming was given. This method means to construct a GP model, the target function of which would be...
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