| 数字高斯白噪声的频域和时域特性分析 |
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| 引用本文： | 申艳,王新民,陈后金,郝晓莉.数字高斯白噪声的频域和时域特性分析[J].北方交通大学学报,2011(3):94-98. |
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| 作者姓名： | 申艳 王新民 陈后金 郝晓莉 |
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| 作者单位： | [1]北京交通大学电子信息工程学院,北京100044 [2]北京无线电测量研究所,北京100039 |
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| 基金项目： | 国家自然科学基金资助项目（60872081,60972093）; 北京市自然科学基金资助项目（4092034）; 中央高校基本科研业务费专项资金资助（2011JBM015） |
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| 摘 要： | 分析了数字高斯白噪声在频域的频谱特性和在时间域的统计特性,提出在数字处理速度一定时,随着输出噪声频域带宽的增加,输出噪声的时间统计特性不再符合高斯分布.通过增加滤波器阶数可以提高噪声的时间统计特性,但是将增加输出噪声的带内波动.通过计算机仿真验证了上述的理论分析,并给出了频域和时域特性都满足相应要求的带宽范围实验值.
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| 关 键 词： | 白噪声 m序列 高斯分布 |
Performance analysis in frequency and time domain of digital white Gaussian noise |
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| SHEN Yan,WANG Xinmin,CHEN Houjin,HAO Xiaoli.Performance analysis in frequency and time domain of digital white Gaussian noise[J].Journal of Northern Jiaotong University,2011(3):94-98. |
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| Authors: | SHEN Yan WANG Xinmin CHEN Houjin HAO Xiaoli |
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| Institution: | 1.School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;2.Beijing Wireless Measurement Institute,Beijing 100039,China) |
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| Abstract: | The performance of the white Gaussian noise in frequency and time domain is analyzed.It is presented that the time statistical properties of the output noise does not obey the Gaussian distribution with the increase bandwidth for the output noise when the digital processing speed is constant.The time statistical properties could be increased by increasing the order of the FIR filter,but it would increase the jitter of the bandwidth of the output noise.Experimental results validate the above analysis.The adjustable range of bandwidth is also given. |
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| Keywords: | white noise m sequence Gaussian distribution |
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