基于DDS的毫米波汽车防撞雷达扫频源设计  

DDS-based Sweep Frequency Source Design for Millimeter Wave Automotive Collision Avoidance Radars

作　　者：刘旭东[1,2] 

机构地区：[1]吉林省经济管理干部学院,长春130021 [2]长春理工大学,长春130022

出　　处：《电讯技术》2010年第4期61-64,共4页Telecommunication Engineering

摘　　要：利用直接数字频率合成(DDS)分辨率高、转换速度快的特点,设计了一种基于DDS芯片AD9910的毫米波汽车防撞雷达扫频信号源。通过DDS芯片产生调频、调幅、调相等各种调制信号,实现了在短距离内快速捕捉目标、处理信息、发出告警的功能。所设计的扫频源输出信号中心频率为8.6 GHz,幅度为-16 dBm,相噪为-70 dBc/Hz@1 kHz,满足了在多目标检测时对信号源的幅度、稳定度和相噪的要求,从而使DDS技术得以在微波检测领域获得应用。Making use of the merits of high resolution ratio and quick conversion rate of Direct Digital Synthesizer （DDS）, a new sweep frequency source is designed with DDS chip AD9910 for Millimeter Wave（MMW） Automotive collision avoidance radars. The rapid functions of catching objects, processing signals and sending alarms are realized through the modulation signals of FM, AM and PM produced by the chip. The center frequency of the output signal is 8.6 GHz, the amplitude is - 16 dBm, and the phase noise is -70 dBc/Hz@ 1 kHz. The specifications meet the requirements of stability, amplitude and phase noise in multi-target detection,thus making DDS technique apply in the field of micro-wave detection.

关 键 词：毫米波 汽车防撞雷达 直接数字频率合成 数字信号处理 串行外围接口 扫频源 

分 类 号：TN952[电子电信—信号与信息处理]