amplify and farward : code in mtalab that produce figures of BER and SNR for amplify and farxard relay

认知无线电中基于能量检测的协作频谱感知，资料中涉及到不同信噪比、采样点数、协作结点的检测概率，具有一定的参考性。-Cognitive radio based on energy detection cooperative spectrum sensing, data related to different SNR, sampling points, the detection probability of cooperative node has a certain reference.

最大信噪比的独立分量分析算法，通过matlab代码，实现了图像的加水印，去噪，加噪声等功能。- SNR largest independent component analysis algorithm, By matlab code, Realize image watermarking, de-noising, plus noise and other functions.