digital-signal-process

Low-pass filters allow the low frequency components of an input signal to pass through while attenuating (reducing) high frequency components. Measurement noise fall into the high frequency range of the signal spectrum, while the underlying process signal usually lies towards the low frequency end. Thus filters that are used to remove noise from measurements are of the low-pass types. This program uses Chebyshev FIR low pass filter based on antenna theory approach to filter noise from human speech signal.

It includes coding for walsh code encoding in matlab.The Walsh functions can be generated (or computed) by many methods. We can construct the Walsh functions by: • Using Hadamard matrices • Exploiting the symmetry properties of Walsh functions themselves. • The Hadamard matrix is a square array of plus and minus ones, {+1, -1}, whose rows and columns are mutually orthogonal

比例导引源程序，用于matlab仿真使用。(proportional navigation method ，which will be used in the matlab.)

介绍了ofdm的原理，发展历史，关键技术等内容(Describes the principles of ofdm, development history, key technologies, etc.)

RBF径向基函数预测的matlab算法，在神经网络算法中预测效果好(Radial basis function RBF prediction matlab algorithm, the neural network algorithm predicted effective)

修改后的phase函数，把它的门限值换为pi，使用更方便(The modified phase function, the threshold for it to pi, the use of more convenient)

数字水印DCT算法设计，可以进行优化，希望大家一起将程序优化(DCT digital watermarking algorithm designe，it can be optimized and I hope that everyone can work together to optimized it.)

beginner level study material for matlab.

本程序实现稀疏主成分分析，相关方法在 H. Zou, T. Hastie, and R. Tibshirani的Sparse principal component analysis中有详细介绍(For SPCA, the method introduced in "Sparse principal component analysis" by H. Zou, T. Hastie, and R. Tibshirani)

双稳态随机共振的参数寻优算法，先固定b，寻求a，画出随a的信噪比增益变化曲线(Parameter stochastic resonance algorithm)