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good paper on cognitive radio spectrum sensing

说明：  matlab的源码工具箱，一些函数的M文件(matlab source toolbox, some functions of the M-file)

说明：  基于小波变化的一些程序，有效的提高语音识别(Some of the procedures based on wavelet transform, effectively improve the speech recognition)

信号的延迟,信号相加,信号相乘,信号翻转,信号和,信号积,信号能量等(Signal delays, the sum signal, signal multiplication, signal inversion, the signal and the signal plot, the signal energy, etc.)

此代码为pi/4-dqpsk的调制解调算法，用MATLAB实现，采用插分解调，简单实用(pi/4-dqpsk this code for the modulation and demodulation algorithm in MATLAB, transfer took decomposition, simple and practical)

the way of some method of matlab

控制系统模型的建立：将常规PID控制改进为带自适应的模糊PID控制，使控制系统的精度和稳定性有比较好的效果(fuzzy pid control)

说明：  基于MATLAB/SIMULINK的PMSM仿真与实现(PMSM)

字典树的基本功能是用来查询某个单词（前缀）在所有单词中出现次数的一种数据结构，它的插入和查询复杂度都为O(len),Len为单词（前缀）长度，但是它的空间复杂度却非常高，如果字符集是26个字母，那每个节点的度就有26个，典型的以空间换时间结构。(The basic function of the dictionary tree data structure is used to query a number of times a word (prefix) appears in all the words, which insertion and query complexity are O (len), Len is a word (prefix) length, but its space complexity is very high, if the character set is 26 letters, and that the degree of each node will have 26, the typical structure of space for time.)

watermarking audio mp3