xihao

仿真一个从卫星到区域数据中心的下行链路（由一组6个载波构成），评估热噪声，交调（IM）失真、由滤波器引起的码间干扰（ISI）以及临频干扰对下行链路性能的影响。(Simulation of a regional data center from the satellite to the downlink (from a group of six carrier composition) to assess the thermal noise, intermodulation (IM) distortion, caused by the filter ISI (ISI) and adjacent channel interference on the downlink link performance.)

语音信号的TDOA算法 TCT双边变换 宽带doa算法 基于MUSIC(TDOA algorithm TCT bilateral transform speech signal)

我用Matlab编写的CG算法，很好用,输入A,b,x的精确解，求解x及误差曲线。(I used Matlab prepared CG algorithm, a very good use, type A, b, x the exact solutions, to solve x and error curve.)

本软件主要用于结构的时域试验模态分析，包括单输入单输出，单输入多输出和多输入多输出程序设计。传统的模态分析软件大多是基于频域分析方法，需首先对采样信号进行Fourier 变换。本软件使用实测时域信号，无需Fourier变换，可以避免由于信号截断而引起泄露、出现旁瓣、分辨率低等问题对辨识精度的不利影响。此外，节省了计算机运算时间，可以对实际工况状态下的结构进行在线参数识别。(This software is mainly used for the structure of time-domain experimental modal analysis, including single-input single-output, single-input multiple-output and multiple-input multiple-output programming. Traditional modal analysis software are mostly based on frequency domain analysis, needed first sampled signal Fourier transform. The software uses the measured time-domain signal without the need for Fourier transform, avoid truncated because of the signal caused by leaks, there sidelobes and low resolution of the issue of adverse effects on the identification accuracy. In addition, the savings in computing time, to the actual condition of the structure of the state-line parameter identification.)

说明：  这是美国麻省理工学院的MATLAB讲义。(This is the Massachusetts Institute of MATLAB handout.)

说明：  香农算法 心音信号的包络提取 适合心音信号的初步处理~~~(Shannon algorithm extracts the envelope of heart sounds)

Use of FFT to compute Continuous-Time Fourier Transform

these codes implement out of band carrier de activation for OFDM. the number of subcarriers is flexible.

输入为JPG格式图像，通过小波模极大值提取图像边缘，共分3级进行提取，输出包括原图像边缘检测结果和不同级别小波边缘图像。(JPG format input image, the wavelet modulus maxima extracted image edge extraction is divided into three, the output includes the original image edge detection results and the different levels of wavelet edge image.)

说明：  这是雷达杂波幅度符合对数正态分布的仿真程序，功率谱分布符合高斯谱。(This is consistent with the range of radar clutter lognormal distribution of the simulation program, power spectrum consistent with the Gaussian spectral distribution.)