【摘要】：鋸齒形線性調(diào)頻連續(xù)波雷達是以對外不斷輻射連續(xù)電磁波信號來獲得運動目標速度和距離信息的系統(tǒng),具有不存在距離盲區(qū)、易獲得非常高距離的分辨率、發(fā)射功率低、抗截獲能力強的特點,超過其它形式調(diào)制連續(xù)波的優(yōu)勢。無論是在軍事領域,導彈精密末制導及雷達引信設置;還是在民用方面,探地雷達等;線性調(diào)頻連續(xù)波雷達都有著廣泛的應用。本文首先研究了鋸齒形連續(xù)波雷達的工作原理,且分別對鋸齒形線性調(diào)頻連續(xù)波雷達接收的單周期回波信號和多周期回波信號進行了詳細分析,并定量分析了距離-耦合問題對最終系統(tǒng)處理的結(jié)果所產(chǎn)生的影響,同時也對雷達信號處理系統(tǒng)的結(jié)構進行了分析研究。在這基礎上,設計了FPGA+DSP協(xié)調(diào)處理架構的雷達信號處理系統(tǒng),包括數(shù)據(jù)采集模塊、數(shù)據(jù)處理模塊、數(shù)據(jù)傳輸模塊等三個模塊。硬件設計部分包括AD數(shù)據(jù)采集控制電路、信號調(diào)理電路、FPGA和DSP配置存儲電路、以太網(wǎng)通信電路、串口通信模塊、系統(tǒng)電源電路以及系統(tǒng)時鐘電路等電路設計。軟件設計部分包括數(shù)字下變頻模塊、有限沖激響應濾波器模塊、FFT模塊等雷達信號處理模塊等模塊設計,以及包括以太網(wǎng)通信模塊、串行接口、FPGA與DSP鏈路口模塊在內(nèi)的數(shù)據(jù)通信模塊設計。通過對實際處理板卡的硬件、數(shù)據(jù)采集模塊和以太網(wǎng)通信模塊的測試結(jié)果進行分析,各項指標都很好的滿足了項目預期的要求,因此能夠應用于艦載雷達信號處理系統(tǒng)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.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN957.51

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本文編號：2164419