Reducing noise by repetition: introduction to signal averaging
Reducing noise by repetition: introduction to signal averaging
复制标题
DOI：
10.1088/0143-0807/31/3/003
复制
发表时间：
2010-05-01
影响因子：
0.7
通讯作者：
Anwar, Muhammad Sabieh
中科院分区：
文献类型：
--
作者：
Hassan, Umer;Anwar, Muhammad Sabieh
本文介绍了理论和实验，从生物物理学和生理测量，以说明信号平均的技术。在这个过程中，学生将被介绍给信号处理的基本概念，如数字滤波，傅里叶变换，基线校正，粉红色和高斯噪声，以及交叉和自相关函数。从这些计算中，学生们估计物理上有趣的参数，如脉搏率和血流速度。他们还了解了量化信号和噪声分量以进行有意义的信噪比计算时遇到的一些陷阱。
This paper describes theory and experiments, taken from biophysics and physiological measurements, to illustrate the technique of signal averaging. In the process, students are introduced to the basic concepts of signal processing, such as digital filtering, Fourier transformation, baseline correction, pink and Gaussian noise, and the cross- and autocorrelation functions. From these computations, the students estimate physically interesting parameters such as the pulse rate and blood flow velocity. They also learn about some of the pitfalls encountered in quantifying the signal and noise components for a meaningful computation of the signal-to-noise ratio.