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数字高斯白噪声的频域和时域特性分析 被引量:1

Performance analysis in frequency and time domain of digital white Gaussian noise
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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. 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.
出处 《北京交通大学学报》 CAS CSCD 北大核心 2011年第3期94-98,共5页 JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金 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)
关键词 白噪声 M序列 高斯分布 white noise m sequence Gaussian distribution
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参考文献16

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二级参考文献8

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