摘要
线性调频信号是雷达系统广泛应用的一种信号,通过脉冲压缩处理,可以得到良好的距离分辨率和径向速度分辨率。本文在研究DDS原理的基础上,给出了一种基于FPGA技术的线性调频信号产生器的设计方案,并利用Altera公司的cyclone Ⅱ系列芯片和QuartusⅡ开发软件对设计进行了仿真验证。采用FPGA技术可以方便地通过修改编程参数,对线性调频信号的起始频率、带宽、频率分辨率进行修改。仿真结果表明,该设计能够产生符合要求的线性调频信号,并且具有结构简单、集成度高、易于修改等特点。
Linear-frequency-modulated （LPM） signal is widely used in modern radar system. Through the pulse compression process, high distance and velocity resolution can be obtained. On the research of DDS principle, a design of LPM signal generator based on FPGA is introduced, and Altera＇s cyclone Ⅱ series of chips as well as the software of Quartus Ⅱ is used to realize and simulate this design. Using the technology of FPGA, beginning of the frequency, band- width, as well as frequency resolution of LPM signal can be easily modifyed by change programming parameters. Simulation result shows that it can generate LPM signal which matches the requirements. Besides this, it also has the merits of simple structure, high integration, easy to modify and so
出处
《电子测试》
2009年第10期49-52,72,共5页
Electronic Test
