| 基于FPGA的信号处理电路在红外图像信噪比提高方面的应用 |
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| 引用本文： | 刘世超.基于FPGA的信号处理电路在红外图像信噪比提高方面的应用[J].科学技术与工程,2012,12(2):431-435. |
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| 作者姓名： | 刘世超 |
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| 作者单位： | 中国科学院上海技术物理研究所空间主动光电技术与系统实验室,上海,200083 |
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| 基金项目： | 国家重大科技基础建设项目资助 |
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| 摘 要： | 本文提出了一种以FPGA为核心的信号处理电路,实现了信号的可编程放大、自适应滤波等功能.其中,可编程放大模块由TI公司的PGA205AU实现.为增大放大倍数采取两片串联；自适应滤波模块由数字电位器和OP27组成的二阶有源滤波器实现,改变电位器的阻值可以改变滤波器的截止频率.实验结果表明,在红外光电系统中应用此信号处理电路可以有效地提高所得图像的信噪比.
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| 关 键 词： | FPGA 可编程增益放大 自适应滤波 信噪比 |
| 收稿时间： | 2011/10/20 0:00:00 |
| 修稿时间： | 11/3/2011 1:06:49 PM |
The application of signal processing circuit based on FPGA in the aspect of SNR improvement of the infrared image |
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| liushichao.The application of signal processing circuit based on FPGA in the aspect of SNR improvement of the infrared image[J].Science Technology and Engineering,2012,12(2):431-435. |
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| Authors: | liushichao |
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| Institution: | (Laboratory of Space Active Electro-optical Technique and System,Shanghai Institute of Technical Physics of the Chinese Academy of Science,Shanghai 200083,P.R.China) |
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| Abstract: | The signal processing circuit based on FPGA was proposed, carrying out the function such as programmable signal amplification, adaptive filtering. Among them, the programmable amplifier module was achieved with the TI's PGA205AU in series; Adaptive filter module was implemented with the second-order active filter composed of the digital potentiometer and OP27, to change the cutoff frequency of the filter by changing the potentiometer resistance. Experimental results show that the signal processing circuit was applied in the infrared optical system improving the signal to noise ratio of the image effectively. |
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| Keywords: | FPGA Programmable gain amplifier Adaptive filter SNR |
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