modbus

说明：  主控mcu与profinet进行SPI通讯的例子程序(An example program of SPI communication between master control MCU and PROFINET)

介绍bch的基础知识，包括纠删码的编码和解码(Introduce the basic knowledge of bch, including the encoding and decoding of erasure codes)

433编程程序实例,非常好用的程序代码，容易移植(433 hello mkdadahfadna gacaca)

说明：  基于宏小区及微小区MIMO信道模型，比较了MIMO信道在两种传输环境中的空间相关特性，通过数值分 析方法得到了两类信道空间相关性随发送端、接收端天线阵列的分布而变化的特征曲线，并分析比较了信道参数， 即到达角的角度扩展，对空间相关性的影响。(The space correlation is analyzed in different propagation conditions including the MIMO macro-cell and micro-cell applications. The characteristics curves describing the space correlation versus the distance of antennas are obtained according to the numerical analysis. The effect of the spread of the angle of arrival on the space correlation is also investigated. )

5个HFSS 无源器件包括：八木天线；功分器；耦合器；滤波器；混合网络(5 HFSS passive devices including: Yagi antenna splitter coupler filter hybrid network)

modbus_com 通讯功能，包括PLC程序(modbus_com communication project,include PLC program)

利用MATLAB来进行大气信道中的激光通信仿真，英文原版(Optical Wireless Communication Systems-system and chanel modelling with matlab)

说明：  Goertzel算法是DTMF信号检测的核心,它利用二极点的IIR滤波器计算离散傅立叶变换值,快速有效的提取输入信号的频谱(Goertzel algorithm is the core of DTMF signal detection. It uses the two-pole IIR filter to calculate the discrete Fourier transform value, and extracts the spectrum of input signal quickly and effectively.)

一个关于蜂窝小区和微小区的信道模型的MATLAB例子，很好用。(MATLAB example of a cell and microcell channel model, well used.)

a file for digital modulation