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In-depth study and explore dynamic quad tree rendering of large-scale terrain. Investigated the problems, which was urgently to be solved, about quad tree. Studied the features and application of dynamic quad tree algorithm and static quad tree algorithm. Analyze and explore the problems about quad tree construction, data storage that is significant in modeling, removing of the grid back, and elimination...
A new method of broadband constant beamwidth beam-forming for circular arrays is proposed in this paper. The design requirements of this method were specified by the weights which formed the low-side-lobe beams of each sub-band over the broad frequency band. The low-side-lobe beams of each sub-band which expands the expected beam using orthogonal series, obtains the orthogonal series coefficients...
This paper presents three kinds of coverage rates, including the averaged coverage rate, the interference conditional coverage rate and the signal conditional coverage rate, to evaluate the performance of adaptive arrays. The coverage rate is the probability of the reception of the desired signal against certain interference scenarios. Numerical results demonstrate that coverage rates can describe...
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