基于距离多普勒概念的全息雷达成像算法

全息雷达成像系统具有电离辐射小、穿透衣服等优点,在人体安检等领域具有广泛的应用前景.然而,现有系统尚存在多运动目标补偿及快速成像能力不足的问题,限制了其在火车站等人流量大的场景中的应用.本文提出了一种基于距离多普勒概念的全息雷达成像方法,其优点是成像速度快、运动补偿方便,具有多运动目标快速成像的潜力.该方法利用了信号在时间采样和空间采样上的对称性,将合成孔径雷达成像中常用的距离多普勒算法引入全息雷达成像.本文对距离多普勒全息雷达成像算法进行了推导,通过仿真及试验,验证了该成像方法具有多目标运动补偿及快速成像的能力.

A range-doppler algorithm for holographic radar imaging

Holographic radar is well suited for the detection of concealed weapons or other contraband carried on by persons since that radio waves are nonionizing, common clothing material penetrable, and can be reflected by the human body and any concealed items. Despite the theoretical potential of holographic radar to provide a useful detection technique, this is unlikely possible in crowd circumstances. The image tends to be blured by the combined effects of multi-targets and target-motion. This paper proposes an algorithm of holographic radar imaging based on range-doppler concepts, which has some advantage in multi-moving target compensation and rapid imaging. According to the symmetry between the time-sampling and the space-sampling, the process of deducing the range-doppler holographic radar imaging algorithm is also proposed in this paper, and simulations and examination results are given to show that this algorithm has the ability to get the multi-targets image rapidly.