ofdm

QPSK调制 经典，非常简洁的产生qpsk的调制方法1(QPSK Modulation)

channel estimation using least square

STM32制作的MP3的全部资料，车牌识别定位程序的部分功能，小波包分析提取振动信号中的特征频率。( STM32 all the information produced by the MP3, Part of the license plate recognition locator feature, Wavelet packet analysis to extract vibration signal characteristic frequency.)

This code simulates the voice traffic model

地震资料 数据处理 分频去噪 模块 主要压制随机噪音 异常振幅 野值 大值 方法特点：1 针对性强，主要去除随机噪音；2 随机噪音识别能力强，达到了较高的去噪水平；3 具有自适应性，能根据不同位置的不同特点统计识别噪音；4 振幅保真，对有效信号的保护性好；5 操作者可根据经验选择参数组合灵活去噪，达到较好的结果。 应用对比：为了展示本模块的去噪效果，所选取的对比对象是某知名成熟商业软件的分频去噪模块，其去噪效果在当前诸多成熟软件模块中是佼佼者，在地震资料处理界具有很好的口碑。 通过对比，说明本模块：1 针对性强，主要去除随机噪音和异常振幅等。2 随机噪音识别能力强，达到了较高的去噪水平。3 具有自适应性，能根据不同位置的不同特点统计识别噪音。4 振幅保真，对有效信号的保护性好。5 操作者可根据经验选择参数组合灵活去噪，达到较好的结果。(Frequency-dependent noise attenuation seismic data, processing module, is mainly to suppress random noise, denoising abnormal/large amplitude values Method of characteristics: 1 targeted, mainly to remove random noise 2 random noise and strong ability to identify , reach a higher level of de-noising 3 is adaptive , able to identify the noise statistics according to the different characteristics of different positions 4 amplitude fidelity , the effective protection of the signal is good 5 denoising operator flexibility to select the combination of parameters according to the experience , to achieve better results . Application contrast: To demonstrate the effect of the de-noising module , the selected object is a well-known comparative commercial software divide mature noising module de-noising effect is the current leader in many mature software module in seismic data processing industry has a good reputation. By contrast, the description of the module : a targeted, mai)

人脸识别matlab代码，可判断是否是库里的人(Face recognition MATLAB code)

利用matlab程序计算一维光子晶体的周期层数对折射率和透射率的影响(Cycle matlab program to calculate the one-dimensional photonic crystal layer refractive index and transmittance)

多径效应的仿真，瑞利平坦衰落信道的改进Jakes模型；得出信号功率随多普勒频移的变化(The simulation of the multipath effect)

说明：  平方根升余弦脉冲实例。两个SQRC滤波器的级联组合就成为一个零ISI的滤波器。此程序用于获得平方根升余弦脉冲。(Square root raised cosine pulse instance. Cascade combination of the two SQRC filters to filter a zero ISI. This procedure used to obtain the square root raised cosine pulse.)

MATLAB实现什么什么滤波，叫做IIR的..MATLAB实现什么什么滤波，叫做IIR的(MATLAB what filtering, IIR called the .. what MATLAB what filtering, called the IIR )