摘要
测距精度是衡量激光引信性能的重要指标之一。以往模拟信号波形处理中常采用前沿阈值法来检测处理波形。但是当激光回波波形因各种因素发生随机起伏和畸变时,这种方法就会出现较大的误差,严重地影响测距精度。设计了一种基于DSP硬件平台的软件化激光引信实现方案,给出了模块化后的硬件电路结构图以及各个功能模块的作用和相互之间的关系。研究了用数字波形处理技术提取测距基准的波形质心算法。通过计算机模拟比较了前沿阈值法和波形质心算法的性能,仿真结果显示波形质心算法具有较低的虚警概率、漏警概率和较高的测距精度。
Ranging accuracy is one of the important parameters which are used to evaluate performance of laser fuze. Threshold method is often adopted to detect analog signal, but if the waveform of detected laser signal distorts or fluctuates with extraneous disturbances, using threshold method often leads to large measurement error and low accuracy. This paper presents a scheme of software laser fuze based DSP, designs modularized circuit, analyses functional modules and relations among the modules. A new waveform centroidal method is given to locate measure reference by digital waveform processing technology. We compare waveform eentroidal method with threshold method by computer simulation, the results indicate that the tower false alarm probability, false dismissal probability and the higher ranging accuracy can be acquired by waveform centroidal method.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2008年第3期1015-1020,共6页
Journal of Astronautics
基金
总装预研基金(9140A05030206HT01)
