simense_840d_nc

说明：  实现20m双绞线有线通讯，一端控制另一端小灯亮暗，反过来，一端发送字符，另一端显示浮点数(Realize 20m twisted-pair cable communication, one end controls the light of the other end, conversely, one end sends characters, the other end shows floating-point numbers.)

MIMO系统中基于压缩感知的有限反馈方法研究,D对研究有限反馈有很好的帮助。(MIMO systems with limited feedback based compressive sensing method study, D finite feedback of good help.)

适用于MATLAB画三维彩图，可用于画多参数平面图。(It can be used for drawing three-dimensional pictures and multi parametric graphs with MATLAB.)

说明：  在AM信号中，载波分量并不携带信息，仍占据大部分功率，如果抑制载波分量的发送，就能够提高功率效率，这就抑制载波双边带调制DSB-SC（Double Side Band with Suppressed Carrier），简称双边带调制（DSB）。(In AM signal, the carrier component does not carry information and still occupies most of the power. If the transmission of the carrier component is suppressed, the power efficiency can be improved. This is called double side band with suppressed carrier (DSB for short).)

In this paper, we present and analyze efficient frame synchronization and frequency offset compensation scheme with ternary sequences for an orthogonal frequency division multiplexing (OFDM) system in Rayleigh fading channels. Frame synchronization is an essential procedure for normal operation of the OFDM system because of sensitivity to synchronization errors. And when there are frequency offsets in OFDM frame, the loss of orthogonality occurs and the interference problem among several subcarriers is introduced. These fact leads to the requirement for joint implementation of the frame synchronization and frequency offset compensation.

说明：  可见光通信经典的dco ofdm 和aco ofdm，加高斯白噪声信道，可以使用的。(The classic DCO OFDM and ACO OFDM in visible light communication, with Gaussian white noise channel, can be used.)

说明：  stm32f4xx 官方标准外设固件库 ，含有多种类型的设计案例(Stm32f4xx official standard peripheral firmware library, containing a variety of design cases)

this project simulate the voice communication between two subscriber stations in office scaled module and test the communications between them

51MODBUS从机程序源码希望对有用的人有用，，(51MODBUS,welcom to here,thank you very mouch.)

LTE 包括MIMO OFDM ,Turbo编码等关键技术，理解4G技术，用matlab建模仿真重要关键技术。(LTE includes key technologies such as MIMO OFDM, Turbo coding and so on, understanding 4G technology and modeling and simulation key technologies with MATLAB.)