Something-of-Matlab

This a matlab code for nested dissection.(This Matlab code for a nested dissection.)

基于OFDM/QPASK信号的周期循环频谱感知算法 认知无线电应用(Based on OFDM/QPASK signal cycle of the spectrum perception algorithm)

The modeling and attitude stabilization control problems of a four-rotor vertical takeoff and landing unmanned air vehicle (UAV) known as the quadrotor are investigated.The quadrotor’s attitude is represented by the unit quaternion rather than Euler angles to avoid singularity problem. Taking dynamical behavior of motors into consideration and ignoring aerodynamic effect, a nonlinear controller is developed to stabilize the attitude.The control design is accomplished by using backstepping control technique.The proposed control law is based on the compensation for the Coriolis and gyroscope torques. Applying Lyapunov stability analysis proves that the closed-loop attitude system is asymptotic stable. Moreover, the controller can guarantee that all the states of the system are uniformly ultimately bounded in the presence of external disturbance torque.The effectiveness of the proposed control approach is analytically authenticated and also validated via simulation study.

车辆传动模型，可进行换以及离合器分离结合挡仿真。(Vehicle transmission model, the shift can be simulated.)

renewable energy mode for beginers

说明：  复杂网络小世界算法MATLAB实现，学习复杂网络的朋友可以以此为开始学习算法(MATLAB complex network to achieve small world algorithm, learning this complex network of friends can start learning algorithm for the)

Matlab code for Channel Estimation

《MATLAB仿真技术与应用》是我见过该类型最好的一本书，这是我那最新版的配套光盘("MATLAB simulation technology and application," I have seen the best of this type of a book. This is my latest version of the matching CD)

用FFT计算信号的功率谱密度时，需要先计算FFT，再计算双边谱密度，然后计算单边谱密度。在matlab里注意FFt要除以采样点数，计算双边谱时要注意除以频率分辨率。 ( When calculated using the FFT power spectrum density signal, you need to calculate the FFT, and then calculate the bilateral spectral density, and then calculate the unilateral spectral density. In matlab in Note FFt divided by sampling points should be noted when calculating the bilateral spectrum divided by the frequency resolution.)

假定一个线性调频信号，作出线性调频信号的时域和频域波形，并对线性调频信号做脉冲压缩(Assuming a linear FM signal, making a linear FM signal in time domain and frequency domain waveforms, and a linear FM signal with pulse compression)