锯齿形线性调频连续波雷达信号处理系统的研制
发布时间：2018-08-04 16:15
【摘要】：锯齿形线性调频连续波雷达是以对外不断辐射连续电磁波信号来获得运动目标速度和距离信息的系统,具有不存在距离盲区、易获得非常高距离的分辨率、发射功率低、抗截获能力强的特点,超过其它形式调制连续波的优势。无论是在军事领域,导弹精密末制导及雷达引信设置;还是在民用方面,探地雷达等;线性调频连续波雷达都有着广泛的应用。本文首先研究了锯齿形连续波雷达的工作原理,且分别对锯齿形线性调频连续波雷达接收的单周期回波信号和多周期回波信号进行了详细分析,并定量分析了距离-耦合问题对最终系统处理的结果所产生的影响,同时也对雷达信号处理系统的结构进行了分析研究。在这基础上,设计了FPGA+DSP协调处理架构的雷达信号处理系统,包括数据采集模块、数据处理模块、数据传输模块等三个模块。硬件设计部分包括AD数据采集控制电路、信号调理电路、FPGA和DSP配置存储电路、以太网通信电路、串口通信模块、系统电源电路以及系统时钟电路等电路设计。软件设计部分包括数字下变频模块、有限冲激响应滤波器模块、FFT模块等雷达信号处理模块等模块设计,以及包括以太网通信模块、串行接口、FPGA与DSP链路口模块在内的数据通信模块设计。通过对实际处理板卡的硬件、数据采集模块和以太网通信模块的测试结果进行分析,各项指标都很好的满足了项目预期的要求,因此能够应用于舰载雷达信号处理系统中。
[Abstract]:Zigzag linear frequency modulation continuous wave radar is a system that continuously radiates the continuous electromagnetic wave signal to obtain the velocity and distance information of moving target. It has no range blind area, easy to obtain very high range resolution and low transmitting power. The strong ability of anti-interception is superior to the advantage of other forms of modulation continuous wave. Both in the military field, missile precision terminal guidance and radar fuze setting, or in civil, ground penetrating radar, linear frequency modulation continuous wave radar have been widely used. In this paper, the working principle of sawtooth continuous wave radar is studied, and the single-period echo signal and multi-period echo signal received by saw tooth linear frequency modulation continuous wave radar are analyzed in detail. The influence of the range-coupling problem on the final system processing results is quantitatively analyzed, and the structure of radar signal processing system is also analyzed and studied. On this basis, a radar signal processing system based on FPGA DSP coordinated processing architecture is designed, which includes three modules: data acquisition module, data processing module and data transmission module. The hardware design includes AD data acquisition and control circuit, signal conditioning circuit, DSP configuration storage circuit, Ethernet communication circuit, serial communication module, system power supply circuit and system clock circuit. The software design includes digital down-conversion module, finite impulse response filter module and FFT module, and includes Ethernet communication module. The design of data communication module between DSP and serial interface. By analyzing the test results of the hardware, data acquisition module and Ethernet communication module of the actual processing board, each index can meet the expected requirements of the project well, so it can be used in the shipborne radar signal processing system.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51
本文编号：2164419
[Abstract]:Zigzag linear frequency modulation continuous wave radar is a system that continuously radiates the continuous electromagnetic wave signal to obtain the velocity and distance information of moving target. It has no range blind area, easy to obtain very high range resolution and low transmitting power. The strong ability of anti-interception is superior to the advantage of other forms of modulation continuous wave. Both in the military field, missile precision terminal guidance and radar fuze setting, or in civil, ground penetrating radar, linear frequency modulation continuous wave radar have been widely used. In this paper, the working principle of sawtooth continuous wave radar is studied, and the single-period echo signal and multi-period echo signal received by saw tooth linear frequency modulation continuous wave radar are analyzed in detail. The influence of the range-coupling problem on the final system processing results is quantitatively analyzed, and the structure of radar signal processing system is also analyzed and studied. On this basis, a radar signal processing system based on FPGA DSP coordinated processing architecture is designed, which includes three modules: data acquisition module, data processing module and data transmission module. The hardware design includes AD data acquisition and control circuit, signal conditioning circuit, DSP configuration storage circuit, Ethernet communication circuit, serial communication module, system power supply circuit and system clock circuit. The software design includes digital down-conversion module, finite impulse response filter module and FFT module, and includes Ethernet communication module. The design of data communication module between DSP and serial interface. By analyzing the test results of the hardware, data acquisition module and Ethernet communication module of the actual processing board, each index can meet the expected requirements of the project well, so it can be used in the shipborne radar signal processing system.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51
【参考文献】
相关硕士学位论文 前2条
1 李先锋;LFMCW雷达中频数字化接收实现研究[D];电子科技大学;2004年
2 梁宇恒;高精度数据采集及DSP+FPGA高速信号处理硬件系统设计[D];西安电子科技大学;2012年
，本文编号：2164419
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