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数字阵列雷达及其进展 总被引:25,自引:3,他引:25
吴曼青 《中国电子科学研究院学报》2006,1(1):11-16
数字阵列雷达是一种接收和发射波束都以数字方式实现的全数字相控阵雷达。由于数字处理所具有的灵活性,数字阵列雷达拥有许多传统相控阵雷达所无法比拟的优越性。本文对数字阵列雷达及其研究进展进行了评述,主要介绍数字阵列雷达的基本原理、关键技术、研究进展,并对数字阵列雷达的应用前景进行了分析,提出了数字阵列雷达发展应考虑的一些问题。 相似文献
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基于数字阵列雷达的特点,提出了一种具备产生多目标、杂波以及干扰等功能的通用信号模拟器设计方案,该方案介绍了模拟器的功能组成、工作原理、工作流程以及系统模型等,在模拟雷达目标的同时,具备叠加模拟大气、杂波和干扰等环境参数的功能。该方案为数字阵列雷达系统调试、性能验证以及模拟训练等提供了有效解决手段。 相似文献
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传统相控阵雷达中的调度算法难以充分发挥数字阵列雷达的多功能优势.针对这一问题,结合数字阵列雷达的任务结构,提出一种在线交错调度算法.通过将交错调度分析分解为时间资源约束分析和能量资源约束分析,算法能够对所有满足约束的任务进行交错调度:利用任务中的等待期来交错执行其它任务的发射期或接收期,并且不同任务的接收期可实现相互交叠.仿真结果表明,由于雷达任务中等待期和接收期得到充分利用,相比于三种传统的调度算法,所提算法的调度成功率、实现价值率和时间利用率均得到有效提升. 相似文献
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数字阵列雷达的发展与构想 总被引:5,自引:7,他引:5
雷达阵列技术的不断进步促进了数字阵列雷达的诞生与发展。对数字化雷达演进及其发展进行了评述,详细分析了数字阵列雷达的系统结构、典型特点、性能优势、演进过程和发展现状。最后,提出了数字阵列雷达未来发展的构架。未来数字阵列雷达将由高度集成的微波子系统加高性能的运算处理平台组成。随着技术的不断进步,未来数字阵列雷达必将朝着通用、灵活、高性能、低成本方向快速发展。 相似文献
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基于TS101的多DSP并行视频实时处理系统硬件设计 总被引:2,自引:0,他引:2
为了满足空中微型传感器双目视频导航图像数字化处理系统的实时需求,文中在介绍了在并行处理技术应用背景的基础上,提出了一种基于TS101的多数字信号处理器(DSP)并行双通道视频处理系统的解决方案,并给出了具体硬件实现.目前,该系统能够实现对双目视频图像的实时采集、数字视频合成和实时存储,从而为双目视频图像导航的实时处理奠定了基础. 相似文献
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Aiming at the task scheduling problem in the DAR (digital array radar), an online task interleaving scheduling algorithm is proposed. The full structure of the DAR task is explicitly considered in a way that the waiting duration can be utilized to transmit or receive subtasks, which is called the task interleaving, as well as the receiving durations of different tasks can be overlapped. The algorithm decomposes the task interleaving analysis into the time resource constraint analysis and the energy resource constraint analysis, and online schedules all kinds of tasks that can be interleaved. Thereby the waiting durations and receiving durations can be fully utilized. The simulation results demonstrate that the proposed algorithm improves the successfully scheduling ratio by 73%, the high value ratio by 86% and the time utilization ratio by 55% compared with the HPEDF (highest priority and earliest deadline first) algorithm. 相似文献
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分布并行实时系统严格划分为硬实时和软实时两类系统。针对直升机工程模拟器和航空电子综合系统这两种实时性不同的系统的网络互连,分别给出了解决方案。特别是对硬实时系统,提出了基于多端口静态存储器和多端口收发器的并行内存实时网,最大优点是没有高层通信协议,且使所有的分系统能并行与中心节点交换数据,能最大限度地降低总传输延时。 相似文献
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Most of the emerging content-based multimedia technologies are based on efficient methods to solve machine early vision tasks. Among other tasks, object segmentation is perhaps the most important problem in single image processing. The solution of this problem is the key technology of the development of the majority of leading-edge interactive video communication technology and telepresence systems. The aim of this paper is to present a robust framework for real-time object segmentation and tracking in video sequences taken simultaneously from different perspectives. The other contribution of the paper is to present a new dedicated parallel hardware architecture. Its composed of a mixture of Digital Signal Processing (DSP) and Field Programmable Gate Array (FPGA) technologies and uses the Content Addressable Memory (CAM) as a main processing unit. Experimental results indicate that small amount of hardware can deliver real-time performance and high accuracy. This is an improvement over previous systems, where execution time of the second-order using a greater amount of hardware has been proposed.Mahmoud Meribout (BS85, M91). Received the PhD degree in Electronic Engineering from the University of Technology of Compiegne (France), in January 3rd 1995. He worked one year as an Associate Researcher, where he has been involved in some industrial projects related to hardware board design and video processing. FromNovember 1995 to October 2000, he has beenworking in Japan, with NTT and NEC corporations respectively, where he has been involved in several projects related to hardware & software design of next generation multimedia and networking equipments. He is holding several Japanese and American patents related to this particular topic. In 1998, he has received the NTT best award for his research and development records.Maamouru Nakanishi received the B.S. and M.S. in Electronics in 1985 and 1987 respectively, all from Kyoto University. Since 1987, he has been engaged in R&D of parallel processing architectures, memory-processor integration technology at NTT Corporation (Tokyo, Japan), when he has been involved in research on Advanced Content Addressable Memory applied to video processing. In 1998, he has received the NTT best award for his research and development records. 相似文献
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雷达信号处理(RSP)系统的实时性一直是系统设计者需要重点考虑的内容之一。为提高雷达系统的实时性,本文提出了一种基于多模式雷达的RSP任务模型,并根据DP-Wrap算法和流水处理的思想提出了一种高效的任务调度算法。研究了在本模型下影响系统最小处理时间的因素,给出了系统最小处理时间的精确表达式,并在此基础上进行数值仿真,给出了根据RSP任务选择处理器个数的依据。 相似文献
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The authors present a parallel algorithm for fast rendering. A set of zones which can be concurrently processed is identified; this set is split into a number of subsets equal to the number of available processors. Each processor renders, in parallel with the others, a zone of its set 相似文献
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Chen Xiaochu Leng Mei 《电子科学学刊(英文版)》1998,15(1):29-34
In this paper, a new recursive algorithm of adaptive array weight vectors and its systolic array implementing structure is proposed, which is based on the QR decomposition algorithms and the idea of algorithmic engineering. The algorithm can realize fully parallel and pipeline processing. 相似文献