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1: 白噪音white noise 所谓白噪音是指一段声音中的频率分量的功率在整个可听范围(0~20KHZ)内都是均匀的。 由于人耳对高频敏感一点这种声音听上去是很吵耳的沙沙声。 2: 粉红噪音pink noise White noise is, however, a very useful approximation to situations in which a disturbing noise is wideband compared with the bandwidth of the system 描述一个随机过程的模型有几种随机游走(random walk)、随机常数 (random constant)、高斯马尔可夫过程(Gauss-Markov), 白噪音(White noise)是一种单调重复的嗡鸣声,其功率谱密度在整个频域内均匀分布。国外有研究证实白噪音可缓解肠绞痛患儿和新生儿的疼痛程度。 学术上讲,白噪音指一段声音中的频率分量的功率在整个可听范围(20~20000HZ)。通俗上讲,白噪音就是大自然中的声音,波段柔和,轻微,有节奏感.
白噪声是指在较宽的频率范围内,各等带宽的频带所含的噪声功率谱密度相等的噪声。一般在物理上把它翻译成白噪声(white noise)。白噪声或白杂讯,是一种功率谱密度为常数的随机信号。换句话说,此信号在各个频段上的功率谱密度是一样的,由于白光是由各种频率(颜色)的单色光混合而成. 白噪声(white noise)是指 功率谱密度 在整个 频域 内是常数的噪声,幅度遵从高斯 (正态)分布,最直观的感受是90年代电视机没台了,播放的“嘶嘶”声。不同响度的白噪声,其声压级会存在差异,但均保持功率谱密度幅值为常数的本质特征。 白噪声源自white noise的翻译,其中的的“白”应该是指其. 加性 高斯白噪声 加性 高斯白噪声 AWGN (Additive White Gaussian Noise) 是最基本的噪声与干扰模型。 其中加性噪声意思是叠加在信号上的一种噪声,通常记为n (t),而且无论有无信号,噪声n (t)都是始终存在的。因此通常称它为加性噪声或加性干扰。 高斯白噪声 白噪声:噪声的 功率谱密度 在所有的频率上.
总的来说,IMU噪声有两类: 表头输出值的噪声,这个叫随机游走 理论上 表头输出值有噪声,但是平均值应该是一定的。但是实际上平均值也是随时间变化,这个叫 零偏不稳定性 所有这些合在一起算的allan 方差的10秒平滑,叫 零偏稳定性
white noise的准确定义呢,是Brownian motion的distributional derivative...因为Brownian motion在 H 1 / 2 δ, W ∈ H s, s ≤ 1 / 2,第二个空间是dual space。 我想可能提问者搞混了两个概念 1.简单或者不严格得来说,白噪的“白”确实是指功率普密度曲线为一条直线,“高斯”指的是噪声信号在幅度上的取值服从高斯或者也叫正态分布,一个是从能量角度描述信号,一个是从幅度角度描述,并没有矛盾之处。 2.更形象的,从随机过程的角度出发,拿出一. These figures illustrate the difference between the real and complex cases by showing the noise power spectral densities of a real bandpass white noise process and its complex lowpass equivalent. 这里表达的意思是,复高斯噪声是来自带通信道实高斯噪声的低通等效,所以用N0.
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