【作者】 王雪；

【导师】 张子敬；

【作者基本信息】 西安电子科技大学 ， 信号与信息处理， 2011， 硕士

【摘要】 雷达信号产生技术在雷达系统中具有举足轻重的作用。随着雷达对抗技术的发展,对雷达信号的产生提出了越来越高的要求,雷达信号产生技术也进入了数字化、集成化的高速发展期。采用FPGA和专用正交数字上变频芯片的方式,既可以产生复杂的雷达信号,同时信号的调制以及初级混频均在数字域完成,避免了模拟器件给信号带来的非线性失真的影响。在信号带宽满足系统要求的情况下,这种方式无论在信号产生方面还是工程实现方面都有一定的优势。本文介绍了雷达中常用的几种信号的产生的理论依据。接着给出了波形产生板各个模块的硬件设计和逻辑设计,通过优化电路设计、电磁分析、电源分析,此波形产生板在硬件的实现上进行了改进。系统测试结果表明,在功耗、稳定性、信噪比和通用性上都符合系统要求。更多还原

【Abstract】 Radar signal generation techniques in radar systems play an important role. With the development of radar countermeasures techniques, the radar signal’s performance is required to be higher and higher, and the radar signal generation techniques have entered the digital and integrated high-speed development period. The use of FPGA and dedicated quadrature digital upconverter chip approach can not only produce complex radar signals, but also avoid nonlinear distortion that analog devices make an impact on the signal because of the signal modulation and the primary mixer are accomplished in the digital field. In the case where the signal bandwidth meets the system requirements, this method has the advantage both in the terms of signal generation and project implementation.This paper describes several theoretical basis of signal generation commonly used in radars. Then the paper gives hardware design and logic design of the waveform generation board’s each module. By optimizing the circuit design, electromagnetic analysis, power analysis, the board’s hardware implementation is improved. System test results show that the power consumption, stability, signal to noise ratio and versatility meet the system requirements.更多还原