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Due to their orthogonality and nearly constant pulse widths, Modified Hermite Pulses (MHPs) have shown a great potential to enhance the data rate of UWB communications by creating M-ary or multiple access parallel systems. However, the potential high power dissipation required by the pulse set generation and the frequency shifting has limited their utilization in practice. In this paper, we propose...
A physically based algorithm for fluid movement simulation is proposed. Compared with the traditional simulation technique, physically based simulation can represent realistic movement better. The Navier-Stokes equations are adopted as the model, and the operator splitting method is employed to split the model into external force term, advection term, diffusion term and projection term. Every step...
The evaluation system is investigated for the disturbing effect of optical countermeasure device to photoelectrical guided weapon in this paper. The general optical countermeasure simulation model is established by using photoelectrical countermeasure simulation test to conduct the estimation of countermeasure effect. The target-missing quantity of guided weapon and guided precision is designated...
We propose an ultra-wide band channel estimation algorithm which is applicable to TH-PPM modulation. The algorithm is based on features of the frequency domain and Recursive Least Squares to estimate channel parameters. The algorithm has low complexity and can easily be applied to engineering. The algorithm can estimate multiple channels with no ambiguity in either the amplitude or the phase of the...
An aircraft reenters or flies at hypersonic speed through the atmosphere is surrounded by plasma sheath that affects on the radiation characteristics of an antenna. According to actual problems, the Navier-Stokes equations is solved using the more effective and stable AUSMPW+ scheme. The calculated electron density distribution in the sheath is concerned with the flow structure which is shown to be...
Weapon-target assignment problem (WTA) was described and its mathematic model was established. Ant colony algorithm (ACA) was introduced briefly, aiming at its defects, the strategy to select the next node was improved. Crossover and mutation in GAs were introduced into ACA, and the search space was opened up. A novel and equivalence method was proposed for WTA, and the steps to realize the algorithm...
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