基于FPGA的高速信号采集与处理.doc

摘要近年来,随着科学技术的发展,数字信号处理技术在各个领域得到了广泛的应用。人们以往通常使用 DSP 和 ARM 来对信号进行采集和处理,但由于 DS P 和 ARM 的许多功能都是靠软件来完成,整个软件的运行需要占采样时间的一部分,再加上它们不能很好地控制复杂的外围硬件电路的逻辑,使得它们在高速数据采集和处理上具有很大的缺陷。现场可编程门阵列( FPGA )具有实时性、可控制性和处理速度快等特点,它的出现使得高速数字信号的采集和处理变得越来越容易。本文设计了基于 FPGA 的高速信号采集板, 并把所采集的信号数据在 FPG A 的开发板 DE2 上接收、验证和处理。设计的主要内容包括: 1. 精心选择 A/D 采样芯片,设计高速信号采集电路板。 FFT 的工作原理,并在 MATLAB 下进行仿真说明。 3. 简绍关于 FPGA 方面的知识和设计所用的开发软件 Quartus II 。 4. 接收并验证所采集的高速信号,并对其做 FFT 变换。试验结果表明,使用 FPGA 能对高速的信号进行准确的采集和处理。整个系统的设计具有实时性好,精度高和可修改性强的特点,可以满足高数信号的采集和处理的需要,为从事高速信号采集和处理的相关人员提供了良好的方法和手段。关键词: FPGA ;高速数据;采集; FFT ; Abstract In the recent years, the digital signal processing technology obtained the widespread application in each domain with science's and technology's development, people formerly usually used DSP and ARM to catch and process the signal. But DSP and ARM's many pletely depend on the software, the entired software's movement needs to occupy the time of catching. in addition they can't control plex periphery circuit's logic of hardware very well. so they have very big flaw in high speed data gathering and processing. Field - Programmable Gate Array has timeliness, the controllability and the processing speed quickly and soon characteristics ,its appearance causes the high speed figure signal gathering and processing e more and more easy. This article has designed based on the FPGA DE2 development board and have processed the signal data which gathers on FPGA development board DE2,the design coverage includes: high speed signal gathering circuit board; the principle of FFT in introduction the knowledge of FPGA and software of Quartus Ⅱ.,Confirmating and making the FFT transformation to the signal. The test ’s result indicates that it is able to carry on and process for the high speed signal with FPGA. All the system has the very good timeliness, high precision and strong modifiability characteristic. it is satisfy the high speed signal gathering and the processing