zernik_moment

说明：  采用db1基本小波来分解信号,比较第三层近似信号与原始信号,重构最大误差,比较第三层近似信号与原始信号.(used db1 to the basic wavelet decomposition signal, the third layer approximate comparison with the original signal signal, the largest reconstruction error Comparing the third layer similar to the original signal with the signal.)

channel estimation for ofdm using pilots

说明：   Feistel cipher is a symmetric structure used in the construction of block ciphers, named after the German-born physicist and cryptographer Horst Feistel

此压缩包是关于USRP中的数字信号处理，包括锁相环、数字滤波器和数据类型转换(digital filer、data convertion)

用matlab实现的曼彻斯特 NleyPu编码。50 占空比（可调）。绘制时域波形和频域功率谱密度。结果跟北邮的DwxXJnF 的通信原理课件上的形状一模一样。 .(With Manchester NleyPu encoding matlab realize. 50 duty cycle (adjustable) . Draw time-domain waveform and frequency domain power spectral density. Results with BUPTDwxXJnF Exactly the same shape Wenbin communication on the principles of courseware.)

说明：  兰伯特投影变换，可将大地坐标与兰伯特坐标系左边相互转换(Lambert projection transformation)

由HFSS仿出S11,S21并导出S11,S21的复数形式，利用matlab调用，就可以算了介电常数和磁导率(By S11, S21 calculate dielectric constant and magnetic conductivity )

document for basic learning of OFDM concepts.

说明：  空间计量 elhorst_model（带中文解释）(Spatial metrology elhorst_model (with Chinese interpretation))

说明：  这个文件可以使用matlab绘制各种带箭头的图。三维或二维的箭头图（矢量图）(This file can use matlab to draw various graphs with arrows. 3-D or 2-D arrow (vector))