random-demodulator

扩频通信中的捕获问题，用GOLD码进行扩频， PN码相位捕获，利用捕获的相位，接收机产生偏移的GOLD码，进行解扩和误码率计算(Spread Spectrum Communication capture issue, GOLD spread spectrum code, PN phase acquisition. The capture phase, the receiver have offset the GOLD code for despreading and bit error rate calculation)

bang zhu chu xue zhe dui jian dan de matlab cheng xu xue xi

matlab中Petri net的工具箱ToolboxPN5(matlab Petri net toolbox—ToolboxPN5)

Matlab入门指导书，英文版，高级读者也可以参考。mathwork公司权威认可(Matlab Getting Started instructions, in English, advanced readers can refer to. mathwork company recognized authority)

: 针对实际振动位移难以获取的问题, 利用振动位移与加速度信号之间的关系, 先对采样后的加速度信 号采用时域数值积分,得到含有趋势项的速度信号及位移信号,再采用拟合多项式极值的方法, 消除积分过程 中产生的趋势项,从而得到更为精确的速度和位移信号. 算例表明, 利用拟合多项式极值消除趋势项的方法, 得到的位移时程曲线拟合精度高(: In pract ical engineering , the collection of displacement data is mo re dif ficult than that of the acceleratio n data in the time-domain .Displacement sig nals w as g ot f rom acceleration s ignals using aumerical integrat ion , wi th the t rend o f erro r. Poly nomial fit ting method o f ex t reme value to eliminate the trend of erro r w as proposed . More precise di splacement data can be acquired f rom thi s algo rithm. The example show s that thi s alg orithm can get hig h accuracy displacement data f rom the acceleration data mo re easi ly .)

三角函数曲线的源程序代码，方便matlab初学者学习。(Trigonometric function curve of the source code, convenient for beginners to learn matlab. )

采用了小波去噪的思想，包括四元数的各种计算,包括调制，解调，信噪比计算。( Using wavelet denoising thought, Including quaternion various calculations, Includes the modulation, demodulation, signal to noise ratio calculation.)

说明：  一些常见调制方式的信道容量计算，BPSK、QPSK、8PSK(ChannelCapacity,BPS\QPSK\8PSK)

特征值，特征向量，解决电动机共振问题实例，matlab实现。()

计算网络节点收缩后的节点重要度，并对电源节点和负荷节点进行归一化(node importance)