eg6_11

说明：  关于数字水印的一些代码 基于离散余弦变换 (on digital watermarking code based on the Discrete Cosine Transform)

Cyclostationary feature analysis

该源码为matlab源码，主要实现建立ggd模型，并进行测试。(the source of Matlab source, mainly for the establishment of ggd model, and for the test.)

采用db4小波对是与信号进行降噪处理，实际效果良好(Using DB4 wavelet denoising is processing and signal, the actual effect is good)

粒子滤波算法预测电池寿命。包括电池容量数据和MATLAB程序。(The RUL prediction of battery based on partical filter. Including battery capacity data and matlab code.)

小波包分析提取振动信号中的特征频率，真的是一个好程序，窗函数法设计一个数字带通FIR滤波器。( Wavelet packet analysis to extract vibration signal characteristic frequency, Really is a good program, A window function design FIR digital band-pass filter.)

matlab绘制各种周期信号如正弦波等常用的信号，下下看吧吧吧。(matlab draw a variety of periodic signals such as sine wave signal, such as commonly used, under the under the bar and see it.)

国外网站下载的程序包，包含mindist_classifier_type，pca，PNN，svm等几个算法程序，希望对大家有用。(Foreign website package, including mindist_classifier_type, pca, PNN, svm algorithm program, and several, we hope to be useful.)

Adaptive filtering constitutes one of the core technologies in digital signal processing and finds numerous application areas in science as well as in industry. Adaptive filtering techniques are used in a wide range of applications, including echo cancellation, adaptive equalization, adaptive noise cancellation, and adaptive beamforming. Acoustic echo cancellation is a common occurrence in today’s telecommunication systems. The signal interference caused by acoustic echo is distracting to users and causes a reduction in the quality of the communication. This paper focuses on the use of LMS and NLMS algorithms to reduce this unwanted echo, thus increasing communication quality.

元学习算法的一种——IDBD算法，实现信道均衡仿真(IDBD, a meta-learning algorithm, realizes channel equalization simulation)