| 基于二阶采样的免混频全数字化正交解调 |
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| 引用本文： | 王飞雪,郭桂蓉.基于二阶采样的免混频全数字化正交解调[J].电子学报,1999,27(6):118-119. |
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| 作者姓名： | 王飞雪 郭桂蓉 |
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| 作者单位： | 国防科技大学自动目标识别国家重点实验室,长沙410073 |
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| 摘 要： | 提出了一种基于二阶采样技术的带通信号免混频全数字化正交解调方法。该方法直接对中频带通信号进行二阶采样，然后通过线性相数字滤波器获得正交的两路基带信号，该方法可省略正交混频环节，与基于一阶采样技术的免混频正交调方法相比，采样率的选择有更大的灵活性。
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| 关 键 词： | 二阶采样 带通 中频采样 正交解调 相干检波 |
Mixer-Free All Digital Quadrature Demodulation Based on Second-ordrer Sampling |
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| Wang Feixue,Guo Guirong.Mixer-Free All Digital Quadrature Demodulation Based on Second-ordrer Sampling[J].Acta Electronica Sinica,1999,27(6):118-119. |
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| Authors: | Wang Feixue Guo Guirong |
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| Abstract: | A mixer-free all digital quadrature demodulation method based on second-order sampling is proposed. This method makes esecond-order sampling of a bandpass signal directly, and produces quadrature basebands by passing the samples through linear-phase-shifting filters. Mixers are omitted in this method. Compared with the methods based on first-order sampling the method we proposed here has more freedom in the selection of sampling rates. |
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| Keywords: | Second-order sampling Bandpass IF sampling Quadrature demodulate Coherent detection |
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