- 32 - http://www.sj-ce.org Scientific Journal of Control Engineering February 2013, Volume 3 Issue 1, PP.32-39 Circuits Design and Implementation for 77GHz Automotive Active Millimeter-Wave Anti-collision Radar Signal Processing Unit Liyu Tian # , Zhen Wu, Yanli Li, Chen Zheng Beijing Institute of Technology, School of Information and Electronics, Beijing 100081, China # Email: [email protected]Abstract The purpose of the millimeter-wave anti-collision radar for vehicles is reducing the accident rate with a higher accuracy of range and velocimetry accuracy. This paper introduced an electric circuit design for signal processing board used in the 77GHz triangle wave frequency modulation radar system, with the processing procedure of secondary radar echo signal amplification, low-noise filtering and high-precision A/D converter and FPGA operation. This paper also introduced the design and simulation for parts of the circuits. The results illustrates that, the design has the advantages of small size, low power consumption, low cost, and has a certain degree of flexibility and scalability. The design reaches the specifications of the vehicle active anti-collision radar. Keywords: Triangular Wave FMCW; Automobile Active Anti-Collision Radar; Secondary Amplification and Filtering; High- Precision A/D Conversion 77GHz 汽车主动毫米波防撞雷达信号处理板的设 计与实现 田黎育,武振,李艳丽,郑晨 北京理工大学 信息与电子学院,北京 100081 摘 要:汽车主动毫米波防撞雷达以高精度目标测距和测速为目标,以提高行车安全系数和减少事故发生率为设计宗旨, 以信号处理平台为核心。本文采用 ADC+FPGA 模式设计了一种用于 77GHz 三角波调频连续波的汽车主动防撞雷达信号 处理机,对雷达天线回波信号进行二次放大、低噪滤波和高精度 A/D 转换,并将转换后的信号送入 FPGA 进行相关信号 处理。本文还对雷达信号处理板主要部分的电路设计及仿真进行了详细阐述。仿真与实测表明,本信号处理板具有体积 小、功耗低、成本低等特点,且具有一定的灵活性和可扩展性,能够实现实际目标的测距和测速,达到了汽车主动防碰 撞雷达的设计指标。 关键词:三角波调频连续波;汽车主动防撞雷达;二次放大与滤波;高精度模数变换 引言 近年来,随着高速公路的发展,汽车行驶速度的不断提高,恶性交通事故频频发生,其中绝大多数道路 交通事故是由人为因素造成的,无法通过规范驾驶员行为加以有效克服。因此,开发研究汽车防碰撞报警系 统,就成了解决高速公路交通安全问题的根本途径 [1] 。汽车主动防碰撞控制系统等主动安全驾驶辅助装置, 可明显减少司机的负担和判断错误,对于提高交通安全,降低恶性交通事故发生率、减少生命财产损失将起 到重要作用 [2] 。在汽车测距和测速的应用中,常用的技术主要有激光方式、超声波方式、红外方式和毫米波 雷达方式 [3] 。其中,激光方式、超声波方式、红外方式存在不同程度的缺陷,而毫米波雷达工作波长介于 1mm~
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Circuits Design and Implementation for 77GHz Automotive Active……
The purpose of the millimeter-wave anti-collision radar for vehicles is reducing the accident rate with a higher accuracy of range and velocimetry accuracy. This paper introduced an electric circuit design for signal processing board used in the 77GHz triangle wave frequency modulation radar system, with the processing procedure of secondary radar echo signal amplification, low-noise filtering and high-precision A/D converter and FPGA operation. This paper also introduced the design and simulation for parts of the circuits. The results illustrates that, the design has the advantages of small size, low power consumption, low cost, and has a certain degree of flexibility and scalability. The design reaches the specifications of the vehicle active anti-collision radar.
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- 32 -
http://www.sj-ce.org
Scientific Journal of Control Engineering February 2013, Volume 3 Issue 1, PP.32-39
Circuits Design and Implementation for 77GHz
Automotive Active Millimeter-Wave Anti-collision
Radar Signal Processing Unit Liyu Tian
#, Zhen Wu, Yanli Li, Chen Zheng
Beijing Institute of Technology, School of Information and Electronics, Beijing 100081, China #Email: [email protected]
Abstract
The purpose of the millimeter-wave anti-collision radar for vehicles is reducing the accident rate with a higher accuracy of range
and velocimetry accuracy. This paper introduced an electric circuit design for signal processing board used in the 77GHz triangle
wave frequency modulation radar system, with the processing procedure of secondary radar echo signal amplification, low-noise
filtering and high-precision A/D converter and FPGA operation. This paper also introduced the design and simulation for parts of
the circuits. The results illustrates that, the design has the advantages of small size, low power consumption, low cost, and has a
certain degree of flexibility and scalability. The design reaches the specifications of the vehicle active anti-collision radar.
Keywords: Triangular Wave FMCW; Automobile Active Anti-Collision Radar; Secondary Amplification and Filtering; High-