mqtt收发

QPSK通过瑞利信道的MATLAB仿真,Alamouti空时码在不同调制方式下的性能仿真(MATLAB Simulation of QPSK over Rayleigh Channel performance Simulation of QPSK Space-Time Code under different Modulation modes)

串口程序，用于通过串口控制空调，可以在这个程序基础上修改其他代码(used for serial port)

圆形阵列的方向图matlab程序，加注释，可以修改相关参数。(The circular array pattern matlab program, plus annotations, can modify the relevant parameters.)

最为经典MIMO detector 算法说明书，可以了解这个MIMO检测过程(For most classic MIMO detector algorithm manual, can understand the MIMO detection process)

已封装好C#调用JSON语句方法，dll文件(Encapsulated C# Call JSON Statement Method, DLL File)

massive MIMO 系统的各种性能仿真(Performance simulation of massive MIMO system)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 (On the wireless channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.)

宽带信号DOA估计的非相干信号子空间（ISM）MATLAB程序(incoherent signal subspace (ISM) MATLAB program for DOA estimation of wideband signals)

说明：  实现雷达信号处理仿真，LFMMTIMTD(radar signal processing,including MTI,MTD,LFM signal)

截获接收机采用时频分析进行跳频通信的参数估计程序(Intercepting the parameter estimation procedure of the receiver for time-frequency analysis for frequency hopping communication)