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汽车防撞毫米波雷达系统参数优化设计
周刚,吴杰
0
(河南工业大学 电气工程学院,郑州 450007)
摘要:
通过分析汽车间相对速度和安全距离的关系,提出线性调频连续波(LFMCW)雷达距 离和速度测量指标。根据测量范围及分辨率要求,制定了信号处理指标。分析了雷达前端工 作参数与测量指标及信号处理技术参数间的制约关系。通过分析差拍频率和多普勒频率的范 围 及耦合关系,讨论了前端中心频率和调频频率应满足的关系。通过时频分析研究了测量 分辨率指标与频域分辨率间的关系。协调修订关键参数,采用CZT算法优化信号处理过程。 给 出了系统参数制定的方法和步骤,该方法可准确快速制定LFMCW雷达系统工作参数。
关键词:  汽车防撞  线性调频连续波雷达  工作参数  CZT算法  优化设 计
DOI:
基金项目:河南省2009年科技发展计划项目(092102210146)
Parameters Optimized Design of Automobile Anti-collision Millimeter Wave Radar System
ZHOU Gang,WU Jie
(Department of Electrical Engineering,Henan University of Technology,Zhengzhou 450007,China)
Abstract:
The distance and velocity indexes of LFMCW(Linear Frequency Modulation Continous Wave) radar are put f orward by analysing the relationship between safe distance and relative velocity of automobile. According to the measurement range and resolution requirement, t he signal processing indexes are constituted. The restrictions between radar front ends p arameters and measurement indexes and signal processing technical parameters ar e analysed. Ranges of beat frequency and Doppler frequency and their coupling re lation are discussed,and the condition and relation that central fre quency and modulation frequency need to meet are discussed. The relation betwe en measurement resolution and frequency resolution is analysed under timefrequ ency analysis. Key parameters are mediated and modified, CZT algorithm is adopt ed to optimize signal processing parameters. The method and steps of constitutin g radar system parameters are provided. The method can establish LFMCW radar system parameters exactly and quickly.
Key words:  automobile anti collision  LFMCW radar  working parameter  CZT algorithm  optimiz ed design