将超宽带技术引入汽车防撞雷达领域。介绍了超宽带汽车防撞雷达对发射信号的要求，给出完整的系统框图和说明，介绍了通过PCI7300A数据采集卡对AD转换后的回波信号进行实时采集，并对采集到的数据进行时域处理的具体过程。重点提出了利用回波位置进行目标识别，以及利用3根接收天线来测角的新方法。针对汽车防撞的使用环境，只对存在相对运动的目标进行检测，从而降低了信号处理的难度，提高了图像的刷新率。

The UWB(Ultra Wide-band) technique is introduced into the Anti-collision radar.The requirement to UWB transmission signal is presented first,followed with a whole system block diagram and detailed explanation.Then,the PCI7300 A card is used to acquire the radar echoes,and the signal is processed in time domain,focused on targets identification and false targets elimination.Because of the specific environment for car anti-collision,only moving target is detected,which decreases the difficulty for signal processing and improves the update rate for imaging.

TN959.2