FFT

一些有用的无线通信物理层的matlab代码，每个文件夹内都有代码使用说明。(some useful MATLAB codes about PHY layer of wireless communication.)

comparaison de modulation par déplacement de phase multi-niveaux MPSK

单目标粒子群优化算法（PSO），通过追随当前搜索到的最优值来寻找全局最优(Particle swarm optimization algorithm)

基于MUSIC的MIMO雷达DOA、DOD估计(DOD and DOA estimation for MIMO radar based on MUSIC)

说明：  四旋翼无人机是一种可以被遥控也可以在无人为控制的状态下执行预定任务的飞行器，与传统直升机相比四旋翼飞行器的机械结构简单，且具有高精度，灵活精度以及较低成本的特点，被广泛用于军事侦察，农艺播撒、快递派送、摄影工作等领域。四旋翼飞行器自身具有欠驱动、多变量、非线性等特性，在外界的噪声干扰情况下，增加了四旋翼无人机的不稳定以及控制系统的设计难度。所以对四旋翼飞行器的位姿控制的研究，可以开拓科研人员对控制算法以及滤波算法的认知，具有重要的研究意义。(Four-rotor UAV is a kind of aircraft that can be controlled remotely or perform scheduled tasks without human control. Compared with traditional helicopters, the Four-rotor UAV has simple mechanical structure, high precision, flexible precision and low cost. It is widely used in military reconnaissance, agricultural broadcast, express delivery, photography and other fields. Four-rotor UAV has the characteristics of under-actuation, multi-variable and non-linearity. Under the circumstance of external noise, the instability of Four-rotor UAV and the difficulty of control system design are increased. Therefore, the research on attitude control of Four-rotor aircraft can broaden the knowledge of control algorithm and filtering algorithm for researchers, and has important research significance.)

IIR一阶低通滤波器 一阶高通滤波器 Notch 嵌波滤波器 Peak 滤波器 IIR低通滤波（Butterworth） IIR高通滤波（Butterworth） IIR带通滤波（Butterworth） IIR带阻滤波（Butterworth） IIR低通滤波（chebyshev 1） IIR低通滤波（chebyshev 1） chebyshev 中用到的函数 cheby.m(First-order IIR low-pass filter the first-order high-pass filter Notch filter inlay Peak wave filter IIR low-pass filter (Butterworth) IIR high-pass filtering (Butterworth) IIR band-pass filter (Butterworth) IIR band-stop filter (Butterworth) IIR low-pass filter (chebyshev 1) IIR low-pass filter (chebyshev 1) chebyshev function used cheby.m)

首先分析了瑞利衰落信道统计特性，并在此基础上给出了clarke模型，然后提出仿真方法，包括成形滤波法、jakes仿真模型及其多种改进方法，接着阐述了上述仿真模型的软件实现过程，并利用matlab进行了计算机仿真，然后给出衰落信号的仿真信号和分析结果，仿真结果证明了提出的仿真模型与理论曲线匹配度高，可以很好地模拟无线衰落信道(First analyze the statistical properties of the Rayleigh fading channel, and clarke model is given on this basis, and then asked the simulation methods, including the forming of the filter method, the the jakes simulation model and a variety of improvement, then described the simulation model of the software implementationprocess, and using matlab computer simulation, and then gives the simulated signals and analysis results of the fading signals, simulation results show the proposed simulation model with the theoretical curve to match high, can simulate the wireless fading channel)

mimo预编码c++程序，相互学习，相互帮助(mimo precoding c++ program, learn each other and help each other)

说明：  四阶经典的龙格-库塔公式的matlab实现(Classical fourth-order Runge- Kutta formula matlab implementation)

program for poluses