QPSK

说明：  一个基于dct变换的数字水印算法的源程序(A dct-based Digital Watermarking Algorithm source code)

包括调制，解调，信噪比计算，包含光伏电池模块、MPPT模块、BOOST模块、逆变模块，能量熵的计算。( Includes the modulation, demodulation, signal to noise ratio calculation, PV modules contain, MPPT module, BOOST module, inverter module, Energy entropy calculation.)

在图像处理时，有时需要用到图像分割。上述资料可以作为使用matlab进行图像分割的参考资料。(In the image processing, and sometimes need to use the image segmentation. The above information can be used as image segmentation using matlab reference.)

应用matlab，小波变换在图像处理中的应用(Application matlab, wavelet transform in image processing)

Maximum likelihood estimation for mixed gaussian function

给定一个三次方程,改进的Newton法求解,并研究各种算法的收敛阶数.(Given a cubic equation, improved Newton method and to study the convergence of various algorithms order.)

说明：  】利用混沌动力学系统中logistic 映射先对水印图像进行置乱预处理以增强其鲁棒性, 在小波域中将原始音频信号按比例分段, 此比例为原始音频信号低频部分与水印信号个数之比, 然后将水印信号加入到音频信号的 低频部分。用StirMark 攻击后的实验结果表明, 该算法对StirMark 的部分攻击具有一定的鲁棒性。(The logistic- map sequences to encrypt the watermark are used. The original audio signal in DWT (Discrete Wavelet Transform) domain is seperated into some pieces determined by the ratio between the length of the low frequency parts and the length of the encrypted watermark. Every bit of the watermark is added into the relevant pieces of the low frequency parts in the DWT domain. Experimental results show that the algorithm is robust against some StirMark attacks.)

PROGRAMME CALCULE LOVIE ET COUCHE DE SOLEIL SIATE ALGERIA

灰色预测的程序，灰色预测是对不确定系统数据的预测(Gray prediction procedure, gray prediction is for uncertain system data)

信道编码，很适用,希望对大家的学习有帮助(viterbi_decoder3_zhushi)