QAM_matlab

非线性最小二乘优化问题，这里提供算法，供大家参考(Nonlinear least squares optimization problem, here are algorithms for reference)

在matlab平台下产生信号序列通过QPSK方式调制通过高斯信道以及瑞利信道，对其中的过程的信号时域以及其频谱，星座图情况进行分析(Matlab platform in the signal sequence generated by the QPSK modulated by the Gaussian channel and Rayleigh channel, which processes the signal for time-domain and its spectrum, constellation analysis of the situation)

最坏情况下使用O(n)次比较,2分搜索算法最坏情形复杂度O(logn)次比较,2分搜索算法比之线性搜索最坏情况下要好.(O (n) comparisons using the worst case, worst-case 2 minutes searching algorithm complexity of O (logn) comparisons, two points lower than the linear search algorithm search for the worst-case better.)

说明：  该程序代码是用于构造非平稳的信号的代码，其统计特性是随时间而变的。(This program code is used to construct non-stationary signals)

一种保持散射特性的极化SAR斑点抑制算法,Lee的基于散射模型降斑算法.(Keep the scattering properties of polarimetric SAR Speckle Reduction Algorithm Based on Lee' s scattering model Despeckling for.)

说明：  material property Au for rcwa calculation

利用MATLAB实现了跳频信号的调制和解调，给出了频谱图。(The use of MATLAB implementation of the frequency hopping signal modulation and demodulation, give the frequency spectrum.)

这是用MATLAB实现的计算器的GUI程序，对于初学MATLAB的新手来说，好不错的一个程序哟(This is achieved using MATLAB GUI calculator program is for beginners new to MATLAB, so good a program yo)

A submarine motion simulation study was performed for the maneuvering character- istics of Draper Laboratories Unmanned Underwater Vehicle (UUV). The Revised StandardSubmarine Equations of Motion (EOM), usually used by the Navy, were augmented to incorporate the case of very high angle of attack and the propeller race-control surface interaction.

电阻Resister的实际应用： 上拉下拉电阻(Pull-up,Pull-down)的处理方法。 0欧电阻的作用,跳线，熔丝等功能。(Resister of the practical application of resistance: Pull-down resistor (Pull-up, Pull-down) approach. 0 The role of the European resistance, jumpers, fuses and other functions.)