In this letter, a radar target simulator (RTS) for the generation of targets for frequency modulated continuous wave (FMCW) chirp sequence radar in the close range of a vehicles surroundings is presented. Key interest is the reproduction of micro-Doppler signatures of vulnerable road users, for example, pedestrians or cyclists. The received $E$ -band radar signal is first converted from the RF band to an IF band, in which the target is manipulated by modulating a range and velocity profile with an IQ modulator. To generate arbitrary signals forms, a PC controlled digital to analog converter (DAC) is used. The RTS has no delay lines to simulate the range, instead it is modulated directly. This allows the distance to be set individually for a large number of targets. In this contribution, the system itself and the underlying concept for the range generation are presented. Finally, measurements of generated static targets and micro-Doppler-signatures are shown.

中文翻译：

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一种近距雷达目标模拟器，用于为弱势道路使用者生成目标的汽车雷达

在这封信中，介绍了一种雷达目标模拟器 (RTS)，用于在车辆周围的近距离范围内为调频连续波 (FMCW) 啁啾序列雷达生成目标。主要兴趣是再现弱势道路使用者（例如行人或骑自行车者）的微多普勒特征。接收到的 $E$ 波段雷达信号首先从 RF 波段转换为 IF 波段，在该波段中，通过使用 IQ 调制器调制距离和速度分布图来操纵目标。为了生成任意信号形式，使用了 PC 控制的数模转换器 (DAC)。RTS 没有延迟线来模拟范围，而是直接调制。这允许为大量目标单独设置距离。在这个贡献中，介绍了系统本身和范围生成的基本概念。最后，显示了生成的静态目标和微多普勒特征的测量结果。