摘要
为了增强汽车行驶的安全性,国外自20世纪60年代已经开始研制汽车雷达;它没能像其它汽车电子产品一样得到广泛应用,除了成本等方面的因素,最主要问题是在应用中遇到的频繁的虚警,这是由汽车运行的环境复杂造成的;从国际研究来看,采用具有良好性能的雷达信号是解决这个问题的主流方法;文章分析了频率键控雷达信号测距的原理以及在实际应用中的不足,分析了线性调频连续波的测距、测速原理,以及在多目标探测时的缺点;文章最后提出了在多目标环境下,为准确探测前方目标,减少路面、防护栏或旁车道车辆所造成的干扰,设计了三角波加入恒频连续波,以及变周期三角波雷达信号,应用于多目标识别。
As a measure to enhance the safety of automotive, Automotive Radar has been under development since the mid 1960s. Automotive Radar has not been as popular as other automotive electronics apart from the consideration of cost issues, in the application the main problem is frequent false alarms, the reason is that the traffic environment is very bad. From international studies, to use radar signal with good performance is the main way to solve this problem. The frequency--shift keying radar signal＇ s principle of measuring distance and the shortcomings in the application are analyzed. The principle of Distance and speed measurement of linear frequency modulation con- tinuous wave and the shortcomings of Multi--target detection are analyzed. The last part of this paper refers that in the multi--objective en vironment, in order to detect target accurately, to reduce the interference from the road, fence or the vehicle of next lane Adding constant frequency triangular wave and Variable cycle triangle wave are designed.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第11期2714-2716,共3页
Computer Measurement &Control
基金
毫米波探测成像技术在公共安全领域应用关键技术研究(F10-066-2-00)
关键词
波形设计
汽车防撞雷达
线性调频连续波
频移键控
测距测速
signal design
automotive collision avoidance radar
LFMCW
FSK
distance and speed measurement
