摘要
目的 :研究生命探测系统的距离分辨能力。方法 :通过给出接收回波信号的距离谱表达式 ,采用近似方法建立频谱展宽与距离分辨力之间的关系 ,来得到它们关系的近拟公式。结果 :分析了其中频信号离散频谱现象和需要限制可分辨最大作用距离的特性 ,给出生命探测系统的中频信号采样所需遵循的准则。结论
AIM: To study the range precision and range r esolution of the life detection system.METHODS: From the discus sion of the range spectrum of target echoes and the relationship between the spe ctrum spread phenomena and range resolution, a simple, practical and approximate formula is obtained. RESULTS: By analysing the spectrum leakage phenomena that exist in its discrete spectrum and the features of the maximum d istinguishable range that should be limited, the sampling criteria of the interm ediate frequency signal in the life detection system is derived.CONCLUSI ON: The study con pride a theoretical basis for the detection methods of the life system.
出处
《第四军医大学学报》
北大核心
2003年第2期169-171,共3页
Journal of the Fourth Military Medical University
基金
第四军医大学校创新工程资助项目 (CX99F0 1 0 )
