| 数字式镜像组合干扰抑制技术及其在测量仪器中的应用 |
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| 引用本文： | 秦开宇,古天祥,陈光禹. 数字式镜像组合干扰抑制技术及其在测量仪器中的应用[J]. 仪器仪表学报, 1999, 20(5): 473-476 |
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| 作者姓名： | 秦开宇 古天祥 陈光禹 |
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| 作者单位： | 电子科技大学自动化系,成都,610054 |
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| 基金项目： | 国防科技预研跨行业基金!资助项目( 97J17.5 .8DZ0 2 6 1) |
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| 摘 要： | 本文提出了一种对仪器信道输入中的被测信号及其镜频干扰信号进行直接采样,然后采用数字混频、滤波、移相处理,进行镜频对消的抑制技术,信道可以获得高Q值、锐截止特性的镜频抑制能力,并且可避免信号幅相失真。在相关仪器中应用此技术,可以降低高频级滤波难度,简化系统构成。本文依此设计了一种实验方案并给出了仿真结果
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| 关 键 词： | 滤波 数字混频 移相 镜频干扰 |
A Digital Approach for Rejecting Image Interference and its Application in Instruments |
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| Qin Kaiyu,Gu Tianxiang,Chen Guangyu. A Digital Approach for Rejecting Image Interference and its Application in Instruments[J]. Chinese Journal of Scientific Instrument, 1999, 20(5): 473-476 |
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| Authors: | Qin Kaiyu Gu Tianxiang Chen Guangyu |
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| Affiliation: | Dept of Automation University of Electronic Science and Technology of China Chengdu 610054 |
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| Abstract: | This paper presents a new filter technique for rejecting image interference With sampling the input (IF) signal directly, then mixing with two quadrature local ooscillators and phase-shifted cancelling image frequency element in digital domain,the filter can obtain high Q, acute cut-off curve, excellent image cancellation ability, little amplitude-phase distortion Finally, an experimental plan and simulation results is discribed |
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| Keywords: | Filter Digital mixer Phase-shift cancellation Mirror-image interference |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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