time_echo

说明：  OFDM基带处理的书籍和论文，以及发送和接收端源码。(OFDM baseband processing books and papers, as well as send and receive source code.)

Laplace可以应用于图像的锐化，根据其原理，对于Laplace后的图像同样可以进行边缘检测。(Laplace can be applied to image sharpening. According to its principle, edge detection can also be performed for images after Laplace.)

U220-模块协议规范 北斗定位模块 对与GPS+BD开发者有参考价值。(U220- module protocol specification BD module)

GPS精密星历卫星轨道插值运算（采用切比雪夫拟合）matlab程序。直接运行chebshev2.mat文件即可，结果显示在doucument2.mat文件中(Precise GPS satellite orbit ephemeris interpolation operation (using Chebyshev fitting) matlab program. Can run directly chebshev2.mat file, the results are displayed in the doucument2.mat file)

generate sine wave. Inputs : Amplitude, phasein, frequency

模拟GPS卫星L1频段的信号进行fft运算。(L1-band GPS signal analog satellite fft operations.)

这是一个讲究的的 介绍VB在犀牛软件里的 很好的东西 你会满意的 相信我(you will be glad)

说明：  针对高动态 环 境 下 突 发 信 号 检 测 问 题，提 出 基 于 高 阶 项 逐 级 消 去 的 非 线 性 调 频 （ｎｏｎ－ｌｉｎｅａｒ　ｆｒｅｑｕｅｎｃｙ ｍｏｄｕｌａｔｉｏｎ，ＮＬＦＭ）信号参数估计算法，利用合理近似，将其转化为相对简单的线性调频 （ｌｉｎｅａｒ　ｆｒｅｑｕｅｎｃｙ　ｍｏｄｕ－ ｌａｔｉｏｎ，ＬＦＭ）信号参数估计问题，并提出两级调频率逼近法用于ＬＦＭ 信号参数估计，具有原理简明、计算复杂度低 等特点，便于实际工程应用．(To detect burst signals in high dynamic environment, a non-linear frequency modulation (NLFM) based on high-order item elimination is proposed. Modulation (NLFM) signal parameter estimation algorithm, using reasonable approximation, is transformed into a relatively simple linear frequency modulation- The problem of LFM signal parameter estimation is discussed. A two-stage frequency modulation approximation method is proposed for LFM signal parameter estimation. It has simple principle and low computational complexity.)

GAMIT中强大的矩阵运算，包括矩阵的压缩存贮，高效求逆算法(GAMIT the powerful matrix operations including matrix compression storage, efficient inverse algorithm)

GPS信号的捕获.GPS信号处理中CA码捕获的Matlab程序,CA码的产生,GPS信号产生(c/a generation GPS signal acquisition)