基于DDS+倍频的宽带LFMCW雷达信号产生设计  

Design and Implementation of Wideband LFMCW Radar Signal Generation Based on DDS and Frequency Multiplication

作　　者：曾维贵[1] 孙迎丰[1] 胥辉旗[1] 

机构地区：[1]海军航空工程学院科研部,山东烟台264001

出　　处：《兵工自动化》2013年第5期1-4,9,共5页Ordnance Industry Automation

摘　　要：针对常规LFMCW信号产生方式存在的不足,提出一种DDS+倍频的宽带LFMCW雷达信号产生方案。在分析直接数字频率合成信号产生和线性调频连续波雷达基本原理的基础上,给出宽带LFMCW信号产生设计流程图,进行了硬件实现,并对其相关功能和指标进行测试。测试结果表明:该方案实用性强,灵活性高,硬件实现难度小。设计的硬件平台输出信号具有调频速度快、频率分辨率高、杂散水平相对较低、带内稳定平坦的特点,可以满足雷达系统距离高分辨的要求。According to the deficiency of conventional signal generation method for linear frequency modulation continuous wave （LFMCW） radar, a wideband LFMCW radar signal generation method based on DDS and frequency multiplication is proposed. On the basis of analyzing the fundamentals of direct digital synthesize （DDS） and LFMCW radar, the design flow chart of signal generation method is presented, and the method is implemented in hardware and its function and performance are tested. The test results show that the method is practical, flexible and easily realized in hardware. For the signal generated by the designed hardware platform, the frequency tune rate and resolution are high, the spur level is low, and the in-band unflatness is small. The proposed method can satisfy the range high resolution demand in LFMCW radar systems .

关 键 词：直接数字频率合成 宽带LFMCW 倍频 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术]