yy

研究d2d通信加中继节点来优化蜂窝小区边缘用户通信，并通过MATLAB仿真(The D2D communication and relay nodes are studied to optimize the edge user communication of cellular cell, and the simulation is carried out by MATLAB.)

in this code you can find the power in cellular network and handoff

说明：  MATLAB code for power allocation in V2X networks using SDR and beamforming

利用wifi信号进行精准的定位，mit代码(locolizing using wifi)

关于nrf24L01的开发设计资料，内含源码分析，可做为设计2.4G无线通信的开发参考(About nrf24L01 development and design information, containing source code analysis can be used as design 2.4G wireless communication development reference)

产生数字信号处理中常用的几种窗函数，包括ectangular window , triangular window ,cosin window , Hanning window , Hamming window , Blackman window ,Papoulis window(producing a digital signal processing used in several window function, including ectangular window, triangular window. cosin window, Hanning window, Hamming window, Blackman window. Papoulis window)

主要用于复数类的计算，功能齐全，经过检验(Mainly used in the plural type of calculation, functional and tested)

在MATLAB中用Goertzel算法（先用FFT算法，再用goertzel算法，）仿真DTMF的产生与检测的程序。应用于双音多频信号的产生与检测。(in Goertzel algorithm using MATLAB (first using FFT algorithm, reuse goertzel algorithm) simulation DTMF detection with the selection process. Used DTMF signal detection with the selection.)

用C#实现的modbus协议源码，非常有价值(modbus protocol by csharp)

实现基于STBC的MIMO_OFDM通信系统在不同信噪比情况下接收端的误比特率的仿真。发射端包括基于基带调制、空时编码、导频插入、IFFT、串并合并以及添加循环前缀；接收端包括去除循环前缀、取出导频估计信道、FFT运算以及并串合并，空时解码等。仿真中采用QPSK、空时编码采用4*3的复正交空时编码矩阵。OFDM子载波数为100，每个子载波传输66个符号，每个符号2比特。IFFT长度为512个符号。发射天线为3个接收天线为2个。(The BER simulation of MIMO_OFDM communication system based on STBC under different SNR is realized. The transmitter includes baseband modulation, space-time coding, pilot insertion, IFFT, serial-parallel combination and adding cyclic prefix; the receiver includes removing cyclic prefix, extracting pilot estimation channel, FFT operation, parallel-serial combination, space-time decoding, etc. The complex orthogonal space-time coding matrix is used in QPSK and space time coding in 4*3. The number of OFDM subcarriers is 100, and each subcarrier transfers 66 symbols with 2 bits per symbol. IFFT is 512 symbols in length. The transmitting antenna is 3 receiving antennas, 2.)