太赫兹频段下地杂波背景中目标检测识别的实验研究

Experimental Research on Target Detection and Recognition under Ground Clutter in Terahertz Band

太赫兹频段地杂波背景下的目标检测与识别,是太赫兹对地雷达系统设计的关键。文中通过实验验证了地杂波背景条件下,在太赫兹频段进行目标检测与识别的可行性。在实验中采集了实际地杂波信号,并通过仿真证明了Weibull杂波模型下的单元平均恒虚警率检测算法能够识别太赫兹频段地杂波背景下的不同目标。所采用的识别方法,在20 dB信噪比时的识别率为83%,验证了目标检测与识别的有效性。文中的实验研究为太赫兹对地雷达系统的设计及应用提供了一种有效的思路和方法。

Target detection and recognition in the background of terahertz ground clutter is the key to the design of terahertz radar systems detecting and recognizing the ground object. The feasibility of using terahertz frequency band for target detection and recognition under the background of ground clutter is verified in experiments. The actual ground clutter signals are collected in the experiment, and it is proved in the simulation that different targets can be identified in the background of ground clutter in terahertz band through the cell average constant false alarm rate detection algorithm under the Weibull clutter model. The proposed recognition method has a recognition rate of 83% at a 20 dB signal-to-noise ratio, proving the effectiveness of the proposed recognition method. Through experimental research, an effective idea is presented for the design and application of terahertz radar system detecting the ground object.