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As a manner of communications with the high spectral and energy efficiency, cognitive underwater acoustic communications based on index modulation (CUAC-IM) have been investigating by us in more recent years. Like other communication system, estimation algorithm on frequency offset (FO) caused by the relative motion of mobile station is crucial to CUAC-IM system. In this paper, system model, especially...
This letter presents a new scheme for ground moving target indication in high-resolution wide-swath (HRWS)-synthetic aperture radar (SAR) systems. The asymmetry of the Doppler spectra is measured to extract the range bins with moving targets. To improve the computational efficiency, only the extracted range bins are used to restore the unambiguous Doppler spectra. The two-look processing technique...
In order to achieve high performance IP address lookup and a specified circuit suitable for onboard IP switch, through the analysis and comparison of the existing onboard routing search algorithms, this paper put forward a novel IP address routing lookup algorithm, which called two-layer compressed trie search algorithm. This algorithm could not only implement “one-to-one” unicast satellite routing...
In signal processing, it is often necessary to measure the sharpness of a distribution. A class of sharpness measures is studied in this paper. First the class is defined. Then the relation between sharpness and the class is clarified, and this justifies the class as sharpness measures. In addition, in general, we investigate the effect of the kernel on the sharpness measure and present a guide to...
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