基于FPGA的外差干涉信号处理方法

SHI Ying; JU Ai-song; LE Yan-fen

doi:10.3969/j.issn.1001-3806.2012.02.020

外差信号处理系统是外差干涉测量系统精度测量的重要组成部分。为了实现外差干涉的相位移测量,采用一种整数计数和小数计数相结合的外差信号相位测量方法,利用VERILOG语言编写整数计数以及小数计数模块程序,并进行了仿真验证,理论分析测量分辨率为(11π/375)rad。结果表明,该方案硬件实现电路简单、可移植性强,只需一个基于现场可编程门阵列的最小系统即可实现。

基于FPGA的外差干涉信号处理方法

1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received Date: 2011-05-25

Accepted Date: 2011-07-03

Available Online: 2012-03-25

Abstract: 外差信号处理系统是外差干涉测量系统精度测量的重要组成部分。为了实现外差干涉的相位移测量,采用一种整数计数和小数计数相结合的外差信号相位测量方法,利用VERILOG语言编写整数计数以及小数计数模块程序,并进行了仿真验证,理论分析测量分辨率为(11π/375)rad。结果表明,该方案硬件实现电路简单、可移植性强,只需一个基于现场可编程门阵列的最小系统即可实现。

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基于FPGA的外差干涉信号处理方法

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