BCC_DEA

matlab in digital communication

一种基于纠错编码的空域自适应水印。嵌入，攻击，提取(an adaptive watermarking based onError correction coding in spatial domain . Embedding, attack, extraction)

本程序仿真了AWGN信道下，采用DS扩频对bpsk信号的影响，扩频码采用walsh码，扩频因子16； 接收端进行rake接收，然后分集合并，比较了三种分集方式对误码率的影响 从图像可以看出在扩频因子较高的情况下，最大比值合并与等增益合并性能相近(This program simulates the AWGN channel, using DS spread spectrum signal for bpsk influence spreading code using walsh code spreading factor 16 Rake receiver receiving end, and diversity combining, diversity compares three methods on the bit error rate of As can be seen from the image in the case of higher spreading factor, the maximum ratio combining and equal gain combining similar performance)

希尔伯特黄变换中英资料，黄先生HHT原文与推荐使用的中文资料，非常有帮助(Hilbert Huang Transform English information Wong HHT original and recommended the use of Chinese data, very helpful)

After identifying the best MNT− 1 nodes with the simplified branch metric and the accumulated branch metric at stage NT − 1, we then calculate the LLR of each coded bit utilizing the standard squared Euclidian distance metric. The log-likelihood ratio (LLR) of a posteriori probability (APP) of each coded bit conditioned on the received signal y is normally calculated using the max-log approximation.

时域有限差分算法模拟二维金属圆柱的近场电场分布(FDTD algorithm for simulating 2D metal cylinder near-field electric field distribution)

模糊聚类和粗糙集关于web聚类很好的文章(Fuzzy Clustering and Rough Set Clustering good article on the web)

matlab code for EAMMH routing protocol for WSN

小世界模型 近日需要用到无标度网络与小世界网络，早上用matlab写了这两种网络的matlab程序，放在这，有用者可以拿去用，请自己验证正确性后使用。 (Small-world model)

source code for different distribution models