zoukankan      html  css  js  c++  java
  • (四)circularly symmetric complex zero-mean white Gaussian noise(循环对称复高斯噪声)

    数学定义

    http://en.wikipedia.org/wiki/Complex_normal_distribution

    通信中的定义

    在通信里,复基带等效系统的噪声是复高斯噪声,其分布就是circularly symmetric complex Gaussian。你可以理解为我们通常意义的噪声,因为不是circularly symmetric的高斯噪声我们在通信里从来不用考虑。

    下面是产生m行n列的 CN(0, sigma^2)噪声(randn(m,n)+1i*randn(m,n))*sigma/sqrt(2)   

    “circular” means the variance of the real and imaginary parts are equal.

    "white" refers to the fact that the power spectral density of the noise is flat across the whole frequency spectrum. This means that its autocorrelation is a Dirac-delta at t=0.(So its covariance matrix will show noise powers on the diagnal elements and zeros elsewhere.)

    "gaussian" means the probability distribution of the amplitudes of the noise samples is Gaussian.

  • 相关阅读:
    Java8 Period.between方法坑及注意事项
    mybatis入门-第一个程序
    mybatis入门-框架原理
    初识servlet--未完成
    初识servlet
    session是什么
    session工作原理简介
    笔记本维修介绍
    j2se 总结
    maven
  • 原文地址:https://www.cnblogs.com/weinapang/p/11193917.html
Copyright © 2011-2022 走看看