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butterworth滤波器的matlab设计，通带截止频率0.3pi，阻带截止频率0.2pi(matlab butterworth filter design, the passband cutoff frequency 0.3pi, stopband cutoff frequency 0.2pi)

Quaternion library for inertial navigation system

Example of wavelet function Mexican hat, haar,

NCO产生正余弦振荡波的matlab程序，很实用。(NCO generate cosine Sasser' s matlab program is very practical.)

PMV、ppd计算程序，matlab版，精确。(PMV, ppd calculation procedures, matlab version, precise.)

利用matlab的simulink进行三杆的工作空间仿真分析(The use of matlab simulink for three working space simulation analysis)

生成《matlab扩展编程》中对于HMM训练的samples.mat程序，自己编写(Generation ‘matlab programming expansion’ in the HMM training samples.mat procedures, written by myself)

说明：  matlab应用百例1,这部分主要是讲述，图形应用方面的问题1-45(matlab application 1)

永磁电机仿真相关程序，用Matlab编写，希望大家能用上！！！！(PMSM control！！Very Good！！！)

This paper studies a cooperative cognitive radio net-work where two primary users (PUs) exchange information with the help of a secondary user (SU) that is equipped with multiple antennas and in return, the SU superimposes its own messages along with the primary transmission. The fundamental problem in the considered network is the design of transmission strategies at the secondary node. It involves three basic elements: first, how to split the power for relaying the primary signals and fo