LFM-and-match-filter

离散傅里叶变换，加窗fft解决谐波信号中的频谱泄露和栅栏效应(Discrete Fourier transform, windowed fft solve harmonic signal leakage and fence effect of spectrum)

　OFDM —— OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。此程序为ofdm仿真程序！(OFDM- OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is the fact MCM Multi-CarrierModulation, a multi-carrier modulation. The main idea is: The channel is divided into a number of orthogonal sub-channel, high-speed data signals into parallel low-speed sub-data stream, modulated to be transmitted in each sub-channel. This program is ofdm simulation program!)

针对频率周期振荡的振动系统讨论自适应控制问题,在频率跟踪的基础上对频率变化的振动响应进行控 制,给出相应的估计、滤波与控制方法。首先在子空间辨识原理的基础上,通过测量信号自相关序列的递推运算获得信号 频率 然后根据估计频率实时调整带通滤波器的中心频率,使其跟踪信号频率,实现信号分量的跟踪滤波 最后在LMS方 法的基础上构造对信号分量进行控制的自适应控制器。(The adaptive vibration control of systems excited by forces of periodically varying frequencieswas dis- cussed. The presented adaptive controlwas realized on the basis of tracking of time-varying frequencies and amethod for online frequency estimation, filtering and controlwas proposed. Based on the principle of subspace identification, the time-varying frequencieswere estimated from the recursively computed autocorrelation ofmeasured signals. )

The codes of Agrawal Book Nonlinear Fiber Optics .

改程序可以读取RINEX3.01格式的伪距和星历文件。同时适用于GPS和北斗系统。(The program can read observe files and ephmeris files in RINEX format.It also applies to GPS and Beidou system.)

本程序的基本功能是对信号进行傅里叶变换，并同时提取出他的时域和频域的特征值。(The basic function of this program is the signal to Fourier transform, and the simultaneous extraction of his time domain and frequency domain characteristic values.)

用matlab gui做的一个成绩查询系统，可读txt,xls文件，并加入一些常见的功能。(Matlab gui to do with a query system performance, read txt, xls file, and add some common features.)

LMD实验程序，效果不太理想，与大家讨论共享。只能分享出PF1.不能实现PF2,PF3的分离(LMD experimental procedure, the effect is not ideal, discuss and share. Only share the PF1. Separation can not be achieved PF2, PF3 the)

东南大学信号与系统MATLAB课后作业源码(Southeast University, Signals and Systems MATLAB source Homework)

matlab学习书籍，好书,初学者推荐，可以好好看看，不好找我(The Language of Technical Computing)