| 基于数字信号特征提取的测频方法研究 |
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| 引用本文： | 曹颖.基于数字信号特征提取的测频方法研究[J].航天电子对抗,2012(5):57-60. |
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| 作者姓名： | 曹颖 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北 石家庄 050081 |
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| 摘 要： | 传统的幂次谱特征能简便有效地提取信号特征并测量参数,但在样本数较少、信噪比较低的情况下,特征就变得不明显了。利用最佳采样点再进行幂次的非线性运算,能够完成特征提取及载频的精确测量。经仿真实验和实际工程验证,在信噪比不大于10dB、样本数不大于1000个符号时,该方法切实、有效。
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| 关 键 词： | 低信噪比 特征分析 载频估计 最佳采样 |
Research on frequency measurement based on digital signals feature extraction |
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| Cao Ying.Research on frequency measurement based on digital signals feature extraction[J].Aerospace Electronic Warfare,2012(5):57-60. |
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| Authors: | Cao Ying |
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| Institution: | Cao Ying(The 54th Research Institute of CETC,Shijiazhuang 050081,Hebei,China) |
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| Abstract: | Conventional power spectrum can extract feature and estimate parameters.But it can not become evident under the condition of lower SNR and less number of symbols.Using the best sample,a method based on non-linearity operation to extract feature and accurately estimate the carrier frequency is proposed.When SNR is not lower than 10dB and the number of symbols is few than 1000,experimental results show that the proposed method is effective with low complexity and high accuracy. |
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| Keywords: | low SNR feature extraction estimate carrier frequency the best sample |
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