标题: | 应用于调频连续波车用防撞警示雷达之角度侦测演算法 A New Direction-of-Arrival Estimation Algorithm for FMCW Vehicle Collision Warning Radar |
作者: | 郑人豪 Cheng, Jen-Hao 钟世忠 Chung, Shyh-Jong 电信工程研究所 |
关键字: | 调频连续波;角度侦测;FMCW;DOA |
公开日期: | 2010 |
摘要: | 本篇论文提出了一个应用于车用防撞警示雷达的角度侦测演算法。为了达到高天线增益,利用两个微带天线馈入透镜天线,当作传输与接受的天线。根据这样的天线架构,新提出的演算法可以判断目标信号的角度。这个演算法可以改善因为单脉冲天线讯号大小比值的线性度不佳所造成角度解析度不好的问题。新演算法另一个优势就是可以提高侦测区域内可侦测目标物的数目。此演算搭配多天线的设计,利用数位波束合成的概念产生多个虚拟的辐射场型,然后利用这些场型合成类似单脉冲天线讯号大小的比值,侦测位于200公尺内,涵盖前方 8∘或是4∘范围内的目标物。 最后,用模拟的方式验证新演算法的可行性。模拟环境也会考虑许多不同的情形以贴近现实真正的情况。同时,目标物的特性:距离、速度还有角度的资讯会被结合在一起,进一步准确地掌握目标物的动态。 In this thesis, a novel Direction of Arrival (DOA) estimation algorithm for vehicle collision warning radar system has been developed. In order to achieve high gain, Lens antenna fed with two microstrip patch antennas will be used as transmitting and receiving antenna. Base on this structure, the new estimation algorithm can extract where the targets’ signal come from. This algorithm can improve poor angle resolution due to non-linearity of conventional monopuls power ratio. Another advantage of new methodology is enhancing the number of targets of interest inside the detection region. New algorithm will cooperate with multiple-antenna design and use the concept of digital beam forming to produce more virtual radiation patterns. Then use these patterns to create quasi-monopulse ratio to detect the targets of interest inside the detection region up to 200 meters with an angle of □ 8∘or □ 4∘. In the end, the simulation will be illustrated to verify the feasibility of the algorithm. Many situations are taken into consideration to ensure the simulation environment close to the real case. At the same time, target distance, speed, angle called target characteristics will be combined together to further describe target motion. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079813579 http://hdl.handle.net/11536/47062 |
显示于类别: | Thesis |