Scheduling Methods for a Conformal, Phased Array Multifunction Radar
| Autor: | Gaspare Galati, Emilio G. Piracci |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Frustum
Engineering business.industry Phased array Tasks scheduling conformal array Settore ING-INF/03 - Telecomunicazioni Conformal antenna Tasks scheduling multifunction radar conformal array Conical surface law.invention Scheduling (computing) Azimuth Bistatic radar law Electronic engineering multifunction radar Radar business Algorithm |
| Popis: | This paper presents a method for the scheduling of a multifunction radar based on an active phased array of the conformal type (frustum of cone). This type of antenna obtains a 360 degrees horizontal coverage by a number M of sectors each one belonging to a sub-array, where different non overlapping sub-arrays can illuminate different targets at the same time. This operation has both the advantages of a rotating antenna and those of the electronic scan of a fixed-faces multifunction radar. In this context, a scheduling algorithm has to organize a number of parallel radar tasks respecting the constrains on the update intervals. The goal is to implement a scheduling algorithm for a system quite similar to a fixed-faces multifunction phased array radar, with the significant difference that the faces number and pointing directions are variable and adaptive to the scenario. An optimization model is presented and then a heuristic models is discussed with some computational results. different faces can be defined with different pointing. This concept is described in the following paragraph, while in paragraph III an optimization model is shown based on heuristic methods. The solution is obtained operating a limited time-shift of the starting times of the tasks and/or a dwell-time reduction, whenever needed. Finally in paragraph IV some simulated trials are presented to show the performance in a given scenario. II. The multifunction radar architecture In this work we considered a multifunction radar called d-Radar and based on a conformal array with radiating elements or "columns" allocated on the surface of a frustum of cone. A bistatic architecture of this system, patented (13), is presented in (14) and (15). In this paper we consider, for the sake of clearness, a monostatic simplified version, as the particular architecture does not influence our basic results. The d-Radar antenna can be seen as a sequence of tilted columns (each one being a uniform linear array), constituting a conical radiating structure. It is possible to define a sub-array by grouping a number of adjacent columns, as shown in Figure 1. The transmission and reception to a defined direction is obtained with a set of columns such that the perpendicular line to the central column points at the desired azimuth. The pointing in elevation is obtained by the appropriate phase difference between the elements on the columns. |
| Databáze: | OpenAIRE |
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