排序方式: 共有73条查询结果,搜索用时 0 毫秒
51.
52.
海洋激光雷达系统的蒙特卡罗模拟方法研究 总被引:4,自引:0,他引:4
提出了一种特别适用于海洋激光雷达系统的高效率的蒙特卡罗模拟方法,与传统的模拟方法相比,该方法在模拟过程中充分地利用了辐射传输过程中的概率知识,因此,大大地降低了模拟的方差,提高了计算效率,利用该方法在微机上对一实际雷达系统的模拟结果进行显示,结果表明,该方法在计算效率大为提高的同时仍保证了良好的计算精度,可以满足系统模拟的需要,为在微机上实现海洋激光雷达系统的蒙特卡罗模拟,提供了一种切实可行的方法 相似文献
53.
探地雷达系统的研制及其应用沈飚,于东海,孙忠良(东南大学毫米波国家重点实验室,南京210018)国外正式研究探地雷达始于50年代.由于土壤的导电性导致电磁波被吸收、散射、损耗,探地雷达系统初期应用仅限于高频电磁波吸收很弱的冰层、岩盐矿等介质.随着电子... 相似文献
54.
针对雷达系统性能指标的相对性、不可比性和灰色性,运用灰色系统理论对雷达系统效能评估问题,提出了一种基于层次-灰色关联度分析法评估效能的模型。以四种型号系列警戒雷达为例给出综合评估的分析实例,实例表明该方法较模糊综合评估更有效。 相似文献
55.
With the rapid development in spaceflights and aeroplanes, the demand for low-power and miniaturization techniques has become insistent in modern radar systems. A new framework for low-power modern radar System on a Chip (SoC) based on ASIX core is presented. Pivotal modules and low-power design flows are described in detail. The dynamic clock-distribution mechanism of the power management module and the influence of the chip power are both stressed. This design adopts the SMIC 0.18-μm 1P6M Salicide CMOS process, the area is 7.825 mm x 7.820 mm, there are approximately 2 million gates and the frequency is 100 MHz. The results show that the modern radar SoC passes the test on modern radar application system and meets the design requirements. The chip incurs power savings of 42.79% during the fore-end phase and 12.77% during the back-end phase. The total power is less than 350 mW for a 100-MHz operating environment. 相似文献
56.
57.
Noise amplitude modulation jamming signal suppression based on weighted-matching pursuit 总被引:1,自引:0,他引:1 下载免费PDF全文
To suppress noise amplitude modulation jamming in a single-antenna radar system, a new method based on weighted-matching pursuit (WMP) algorithm is proposed, which can achieve underdetermined blind sources separation of the jamming and the target echo from the jammed mixture in the single channel of the receiver. Firstly, the presented method utilizes a prior information about the differences between the jamming component and the radar transmitted signal to construct two signal-adapted sub-dictionaries and to determine the weights. Then the WMP algorithm is applied to remove the jamming component from the mixture. Experimental results verify the validity of the presented method. By comparison of the pulse compression performance, the simulation results shows that the presented method is superior to the method of frequency domain cancellation (FDC) when the jamming-to-signal ratio (JSR) is lower than 15 dB. 相似文献
58.
59.
针对民用小型无人机被广泛应用而带来的安全隐患问题,本文将交互式多模型算法应用于雷达单目标跟踪系统,并对其进行了研究与仿真.首先,建立常见的目标运动模型,对每个运动模型的状态方程进行分析,介绍了交互式多模型算法的原理及计算方法.然后,分析了坐标转换误差对雷达跟踪性能的影响,并给出转换误差的补偿结果.最后,通过蒙特卡洛仿真... 相似文献
60.