image-Contour-detecting-

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.)

2014美赛相关MATLAB程序（基于NS模型）(about traffic flow)

kalman filter extended

雷达系统与分析（MATLAB版）的源程序，是比较老版本的源程序(Radar Systems and Analysis (MATLAB version) source code, it is more the old version of the source)

说明：  通信原理系统仿真系列--ASK的调制。供刚接触到matlab编程的朋友使用。(communications system simulation series-- ASK modulation. For Matlab programming begin to use a friend.)

This program determines the starting behaviour of the induction motor using the steady state ac circuit to represent it.

说明：  之前版本中HHT变换需要用到的函数,用于计算Hilbert谱(Functions needed for HHT transformation in previous versions)

标准NOISEX-92噪声库，对于声音信号分析的人有用。(Standard noise NOISEX-92 library, the human voice signal analysis for useful.)

随机信号功率谱估计 非常好 希望能够帮助大家(Random signal power spectrum estimation Very good hope to help everyone)

详细介绍了利用等纹波设计和凯泽窗法设计FIR滤波器的方法，并进行了仿真，并对纹波系数和衰减进行了比较(Details of the method of utilization ripple design and Kaiser window FIR filter design, and simulation, and the ripple factor and attenuation compared)