FM

产生PN序列码的源代码，里面有详细的注释！希望对有需要的朋友有用！(PN code sequence generated source code, which has detailed notes! Wish to have a friend in need useful!)

误比特算法(Fischer algorithm for min BER)(Fischer algorithm for min BER)

DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)

power_voltmeasure,matlab仿真文件,电力电子、功率电子控制方面很有价值，调试通过(aspects of power_voltmeasure, matlab simulation files, power electronics, power electronics control valuable debugging through)

说明：  产生高斯白噪声，标准差和期望都固定，如N=f（0.1，2），这种形式的，随机产生40个(Generated white Gaussian noise, standard deviation and expectations are fixed, such as N = f (0.1,2), this form of randomly generated 40)

Mathematica教程，包含12个章节，叙述详细，可以满足基本需求(Mathematica tutorial contains 12 chapters, describes in detail, to meet basic needs)

一个很有意思的小程序，可以用于向对方表白哦。(A very interesting small program that can be used to declare each other oh.)

活动轮廓模型也称蛇形，定义为最小的能量样条曲线(Active contour model, also known as snake, is defined as the minimal energy splines)

基于鱼群算法的研究，matlab仿真和分析(Based on the study of fish school algorithm matlab simulation and analysis)

小数据量法求Lyapunov指数_龙格库塔(Small amount of data Lyapunov index _ method Runge-Kutta)