12593935

说明：  该文件包括了连续周期信号的单边带及双边带频谱分析的所有源代码及仿真波形，设计完整，而且符合要求。(The document includes a continuous cycle, and bilateral single-sideband signal with a spectral analysis of all source code and simulation waveforms, design integrity, but also meet the requirement.)

说明：  通过引力搜索算法，进行支持向量机参数优化。实现模式识别和趋势预测。(The parameters of support vector machine are optimized by gravitational search algorithm. Realize pattern recognition and trend prediction.)

1.题目：数字滤波器的设计与应用 2.设计要求：利用 Matlab 软件,以复合信号分离为例,对 “数字信号处理” 课程中 的谱分析 、数字滤波器设计和信号滤波这三个过程进行了仿真实现,给出了仿真结果。 3.具体步骤： （1）构造原始信号s(t) （2）画出s(t)的频谱 （3）设计ellipse数字滤波器(IIR)，包括低通，带通，带通，并显示幅频特性 （4）用得到的滤波器进行滤波，分离出三路信号，观察时域波形和幅频特性 （5）用三路信号s1,s2,s3尝试重新合成原始信号 4.问题：为什么重新合成的信号和原信号不相等呢？谁能解释一下？谢谢,QQ:664519036( 1. Title: Digital Filter Design and Application 2. Design requirements: use of Matlab software to composite signal separation, for example, on "Digital Signal Processing" course Of the spectral analysis, digital filter design and signal filtering process carried out three Simulation, the simulation results. 3. Concrete steps: (1) construct the original signal s (t) (2) Draw s (t) of the spectrum (3) design ellipse digital filter (IIR), including low pass, band pass, band pass, and shows amplitude-frequency characteristics (4) filtering with a filter obtained by the isolation of three signals, observed time-domain waveform and frequency characteristics (5) with a three-way signal s1, s2, s3 try to re-synthesis of the original signal 4. Question: Why is re-synthesized signal and the original signal is not equal to it? Who can explain? Thank you, QQ: 664519036)

matlab函数、命令集 一共有几百条，按字母索引(matlab function, command set)

采用谱减法的语音降噪实现代码，适用于语音和音频系统中，可直接调用。(Speech noise reduction using spectral subtraction implementation code, for voice and audio systems, can be called directly.)

运用交替投影算法进行波束优化，可控制主瓣宽度及副瓣电平(The alternating projection algorithm is used to optimize the beam, which can control the width of the main lobe and the sidelobe level.)

使用matlab做的LTE的系统级别的仿真源代码，对LTE有着详细的功能实现(Using matlab to do system-level simulation of LTE, the source code, the detailed features of the LTE has to achieve)

图像进行小波分解后，对于相对来说不重要的高频成份采用较高的阈值，进行高压缩；而对集中图像大部分能量的低频成分采用较小阈值，以确保图像恢复时的质量(Image Compression)

本程序是自己写的，经过验证的，瑞利衰落信道下的BPSK信号仿真(This program is written in their own, after verification, simulation of BPSK signals in Rayleigh fading channels)

一种新的符号定时和载波频率同步算法,该算法将OFDM符号分成几部分。它使用相关性和积累在几个OFDM同步算法对OFDM系统基于试点,使用前言快速、准确获取信号,在有限的时间建立同步,利用导频跟踪同步信息(A new symbol timing and carrier frequency synchronization algorithm is presented and the algorithm divides the OFDM symbol into several parts. It uses correlation and accumulation in several OFDM a synchronization algorithms for OFDM system based on pilot, using the preamble to fast and accurate acquire signal, establish synchronization in the limited time, and using pilot to track synchronization information)