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《电光系统》2002,(2):48-51,57
多普勒雷达能够测量移动目标的位置和速度,但只用其信息很难进行目标识别,通常,目前识别是把多普勒雷达接收到的信号变换成可听频段,人从其声音或频谱图中进行识别,但是,此方法识别的结果是依靠人类的经验及技术,很难得到稳定的结果,本论文研究了将目标识别自动化以及获得稳定的识别结构的处理方法。识别处理中,重要的是对作为识别对象的目标的固有特性提取,由于用多普勒雷达接收到的目标固有的特性,是具有目标的速度分布,所以,能够从频谱及频谱图中提取,频谱是目标速度变化和速度分布变化,而频谱图不用目标速度就能提取速度分布,文中建议根据此频谱图的特性,利用多普勒雷达进行目标识别处理这一方法。 相似文献
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基于目标运动分辨技术提取导弹目标运动特征 总被引:9,自引:3,他引:6
空间运动特征是导弹目标识别所依据的主要目标特性之一。本文基于目标运动分辨(TMR)技术,研究了导弹目标空间运动特征提取的方法与处理步骤,并用实测数据进行了验证。 相似文献
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恒虚警检测在DSP芯片上的实现 总被引:5,自引:1,他引:4
强杂波背景中的雷达目标恒虚警检测是雷达信号处理的重要组成部分。随着大规模集成电路,特别是高性能数字信号处理器的出现和数字信号处理技术在雷达信号处理中的广泛应用,如何在高性能数字信号处理器上高效地实现雷达信号处理算法成为雷达工程师需要着重研究的课题。首先介绍了数字信号处理芯片,ADSP21160的主要特点,然后讨论了瑞利分布杂波背景中雷达目标恒虚警检测的原理,最后着重阐述了基于数字信号处理芯片ADSP21160实现杂波背景中雷达目标恒虚警检测的方法和仿真实验结果。 相似文献
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高分辨雷达在噪声中提取目标信号方法研究 总被引:3,自引:0,他引:3
高分辨雷达(HRR)中目标回波信号并不单独地存在于某一个距离分辨单元内,所以其提取目标信号方法与一般的低分辨雷达(LRR)不同。本文研究HRR在噪声中提取目标回波信号的方法,这些方法可总结为相关处理和频域傅氏变换处理两种,在本文最后给出两种处理方法输出的波形。 相似文献
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针对自有加工企业设备使用时间存在限制无法满足产品交货期的综合调度问题,该文提出存在设备时间限制的两个企业协同的综合调度算法。为了保证自有加工企业能够获得更多的收益,需要将加工任务尽可能多地分配给自有加工企业进行加工。因此,需要将加工任务进行有效分解,首先逆向遍历加工树,将自有加工企业设备使用时间上限作为阈值,设计加工任务分配策略对加工树进行拆分并生成自有加工企业加工的拆分加工树,其余部分为协同加工企业加工的协同加工树。然后设计协同选择策略,在考虑到运输问题并满足交货期的前提下,选取使自有加工企业收益最大的企业为协同加工企业。最后实例分析,该算法可以更好地解决加工企业设备使用时间存在限制并带有交货期和收益的企业车间协同综合调度问题。 相似文献
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Image processing is often considered a good candidate for the application of parallel processing because of the large volumes of data and the complex algorithms commonly encountered. This paper presents a tutorial introduction to the field of parallel image processing. After introducing the classes of parallel processing a brief review of architectures for parallel image processing is presented. Software design for low-level image processing and parallelism in high-level image processing are discussed and an application of parallel processing to handwritten postcode recognition is described. The paper concludes with a look at future technology and market trends 相似文献
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Vector directional filters (VDF) for multichannel image processing are introduced and studied. These filters separate the processing of vector-valued signals into directional processing and magnitude processing. This provides a link between single-channel image processing where only magnitude processing is essentially performed, and multichannel image processing where both the direction and the magnitude of the image vectors play an important role in the resulting (processed) image. VDF find applications in satellite image data processing, color image processing, and multispectral biomedical image processing. Results are presented here for the case of color images, as an important example of multichannel image processing. It is shown that VDF can achieve very good filtering results for various noise source models. 相似文献
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Klaus Gaedke Hartwig Jeschke Peter Pirsch 《The Journal of VLSI Signal Processing》1993,5(2-3):159-169
A MIMD based multiprocessor architecture for real-time video processing applications consisting of identical bus connected processing elements has been developed. Each processing element contains a RISC processor for controlling and data-dependent tasks and a Low Level Coprocessor for fast processing of convolution-type video processing tasks. To achieve efficient parallel processing of video input signals, the architecture supports independent processing of overlapping image segments. Running at a clock rate of 40 MHz, a single processing element provides a peak performance of 640 Mega arithmetic operations per second (MOPS). For the real-time processing of basic video processing tasks like 3×3 FIR-filter, 8×8 2D-DCT and motion estimation, a single processing element provides a sufficient computational rate for video signals with Common Intermediate Format (CIF) at a frame rate up to 30 Hz. For hybrid source coding of CIF video signals at a frame rate of 30 Hz a multiprocessor system consisting of six processing elements is required. A linear speedup of the multiprocessor system compared to a single processing element is achieved. A VLSI implementation of a processing element in 0.8 µm CMOS technology is under development. 相似文献
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Optical information processing and beyond 总被引:2,自引:0,他引:2
Ichioka Y. Iwaki T. Matsuoka K. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1996,84(5):694-719
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