宽带雷达的目标检测通常采用一维距离像能量积累的方法,以改善检测性能。首先建立了宽带雷达目标的一维距离像模型,然后基于似然比检测理论推导了随机幅度、随机相位目标距离像的平方律检测器,给出了检测器的检测概率和虚警概率计算公式,分析了检测器的检测性能。但是,由于对目标距离像的分布不甚清楚,为了不损失距离像能量,通常会在较多的距离单元上进行能量积累,这样目标距离像仅存在于部分待检测单元中,另外一些单元则是纯噪声单元,因此会导致检测器性能下降,文中对此进行了计算,研究结果对工程实践具有参考价值。

The energy integration of one-dimensional range profile is often used in the target detection of wideband radar to improve the detection performance. The one-dimensional range profile model of target in the wideband radar is first built in this paper, then based on the likelihood ratio detection theory, the square-law detector for the target range profile with random amplitude and random phase is derived, the detection probability and false-alarm probability formulas for the square-law detector are presented, and the detection performance is analyzed. Because the distribution of target range profile can not be exactly obtained, however, to avoid the energy loss of range profile, the energy integration is usually performed over the more range cells than the real target ones. The target range profile only occupies a part of detected range cells, and other cells are noise ones, therefore the detection performance is degraded owing to the integrated noise cells, and the loss of signal to noise ratio is computed. All the research results are of reference value for the engineering practice.

TN957. 51

南京工业职业技术大学科研基金资助项目(YK21-02-04)