K_mean_julei

实现matlab仿真生成ofdm系统，但不涉及信道估计等内容(Matlab simulation ofdm achieve generation systems, but does not involve channel estimation, etc.)

RADAR scateriing using pulse compression principle

MATLAB temperature fieldMATLAB temperature field

说明：  利用压缩包内的5和函数产生PPM调制的UWB信号，信号波形为高斯二阶导函数。重复编码次数，TH码长度范围，波形形成参数alpha等参数均可以改变(use compressed within the five functions to generate PPM and the UWB signal modulation, Waveform second derivative of the Gaussian function. Repeat code number, TH code length, alpha waveform parameters such as formation parameters can be changed)

linear interpolation a source code for Matlab software about math

对信号进行傅里叶变换，并绘出频谱图，功率谱，对数谱等。然后对信号进行反傅里叶变换恢复出原始信号，并绘出其各种谱图(The Fourier transform of the signal, and plot the frequency spectrum, power spectrum, the number spectrum. And inverse Fourier transform to recover the original signal and plot its various spectrum signal)

Code for plotting bessel functions

说明：  使用线性模型对数据进行多项式拟合和正弦拟合(Polynomial and Sinusoidal Fitting of Data Using Linear Model)

matlab中傅立叶变化，主要是处理文本格式的数据文件。(matlab in Fourier changes, mainly to deal with text data files.)

用BP网络完成函数的逼近 P网络通常有一个或多个隐层，隐层中的神经元均采用sigmoid型变换函数，输出层的神经元采用纯线性变换函数。本例应用一个两层BP网络来完成函数逼近的任务，其中隐层的神经元个数是5。(network to be completed by BP function approximation P networks usually have one or more hidden layer, a hidden layer neurons are used sigmoid-type transformation function, the output layer neurons using pure linear transformation function. The application of a two-tier cases BP network function approximation to complete the task, hidden layer neuron number is 5.)