摘要
讨论了线性度对线性调频雷达距离分辨力的影响,求得了线性调频雷达的极限分辨力,导出了调频非线性对距离分辨力影响的数学表达式,以及用于工程的近似估计公式。用计算机仿真验证了这种影响。仿真结果和理论分析表明,距离分辨力随以下三个参数的增大而降低:国标距离,频率偏离函数F(t)的高次谐波和最大值。线性调频雷达的极限分辨力取决于发射波形的带宽。
The effect of the linearity on range resolution of linear frequency-modulated (LFM) radar is discussed. The limit resolution of LFM radar is obtained. A mathematic presentation of the effect of nonlinear frequency modulation on range resolution is derived and an approximate evaluation for engineering is presented. Finally, the results of computer simulation demonstrate the effect. The results of simulation and the theoretical analysis show that the range resoluation reduces as the following three parameters increase: the range to the target, the higher harmonic components and the maximum of the frequency deviatiom function F (t). The limit of the range resolution of a LFM radar depends on the bandwidth of transmitted waveform.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1992年第2期121-126,共6页
Journal of University of Electronic Science and Technology of China
关键词
线性调频雷达
线性度
距离分辨力
linear frequency-modulated radar
linearity
range resolution
