RF_positive_q

介绍了数字通信中的QPSK调制解调的原理，通过用Matlab编写脚本程序对QPSK通信系统的发射和接收过程的具体实现进行模拟仿真，绘出信号在理想信道和加噪信道中模拟传输时的时域图，并对各模块进行了频谱分析，所得到的结果与理论基本相符，对于理解QPSK系统的性能并在系统的实际应用上作进一步的设计，提供了有效的参考依据(The introduction was done with the principle of the QPSK modulation and demodulation in digital communications, a script was written by using Matlab program to carry out a simulation of the QPSK communication system ,which contains the concrete realization of transmit and receive process. The time-domain diagram is drew separately when the signal transmits in the ideal channel and in the channel with noise, spectral analysis of each module is also done, the results obtained with theoretical results in the main, which provides an effective frame of reference for understanding the performance of QPSK systems, and the practical application in the system to make further designed.)

说明：  　通过在MA TLAB 图形窗口中加入菜单及控制, 实现直接对窗口对象的操作, 建立了一个 适合用户需要的语音分析处理平台, 并给出了一般的设计方法.(MA TLAB graphics window by adding menus and control, the direct operation of the window object, the establishment of a voice suited to user needs analysis and processing platform, Further calculation and analyzation of the design Fangfa.)

在matlab的ui里创建滑动组件,具有交互式文件编辑框，标签等多种功能。(Creates a slider in a separate uipanel, with an associated interactive EditBox, and left and right labels showing the minimum and maximum values of the slider, respectively.Moving the slider automatically updates the textbox, and vice versa. Both slider movement and text edits will trigger (non-recursively) the callback of the slider.)

使用pid方法控制单级倒立摆，解压后把两个文件放在同一个文件夹里双击nn_pid.m就行了(Pid way to control the use of single-stage inverted pendulum, after extracting the two files in one folder double-click on the list nn_pid.m)

三相pwm电路matlab仿真,已经试过可以使用(three pwm)

Visual Studio 2008 下可以编译通过的CJLibary.(CJLibrary version 6.08c with Visual Studio 2008 project.)

请拾取第一根线(LINE)或弧(ARC)连接线段或圆弧 ,再拾取第二根线(LINE)或弧(ARC)进行连接(Please pick up the first lines (LINE) or arc (ARC) connection line or arc, then picked up second line (LINE) or arc (ARC) connection)

add round matlab very important

GPS接收机中的采用卡尔曼滤波实现定位解算的MATLAB代码(Kalman filter is used to achieve the positioning solver MATLAB code GPS receiver)

hi di attached the matlab source code