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A filter is a system which modifies some special frequencies reletive to the others. As a result it is applicable in some applications when it is necessary to have different gains & phase shifts at different frequencies to perform specific filtering tasks. For example in an audio file which is corrupted by noise it is convinient to use a filter to cancel those frequencies which are affected by noise and consequently having a better sound quality. During this MATLAB experiment we are trying to cancel the noise frequencies out of the original signal frequencies to get the original signal. Due to do this task, different types of filters such as FIR and IIR filters are used. In FIR filters, we use two type of common windows such as fixed window like Hanning and adjustable window like Kaiser. In IIR filters four different types of filter such as Butterworth, Chebyshev I, Chebyshev II, Elliptic are used.

倒立摆系统的变结构控制方案，思路清晰，适合初学者参考(Inverted pendulum system of variable structure control program is clearly thought suitable for beginners reference)

Power Supply sysnem russia version

m、W序列的产生及仿真，扩频复合系统的源程序(m and W sequence generation and simulation, source of spread spectrum composite systems)

用于无线通信系统中提高通信质量、减小误码率的有效措施的操作工具(Used in wireless communication systems to improve communication quality, effective measures to reduce the error rate)

单级倒立摆LQR控制，通过LQR控制，为了使系统具有快速的响应，对Q矩阵中的参数Q11和Q33进行调整。(Linear Quadratic Regulator——LQR，adjust the parameter of the Q，fasting the response rate)

MATLAB PID控制程序包，里面有较强的功能实现。(MATLAB PID control package, which has strong functions.)

说明：  完整的QPSK的调制与解调，已调试通过，认真学习一下(QPSK modulation and demodulation)

使用matlab编程，图论最短路线的Ford迭代算法、Dijkstra算法和Floyd算法(Ford shortest graph theory iterative algorithm)

zero是matlab编程中必须用到的语言 此文试用于matlab新手进行基本zero的了解，其实就是零矩阵(zero used for matlab newer)