fre_domain

对通信多径分析的SIMULINK文件，可仿真多径、信道衰落等。(SIMULINK file communication multipath analysis, simulation multipath channel fading, etc.)

Ds_CDMA EASI 算法使用两个用户的分离实现PN序列以及用户信息的分离(To solve the problem of the direct sequence code division multiple access (DS-CDMA) system multiuser detection, this paper proposes a variable step-size based on performance index (PI) EASI algorithm for information code and chip sequence blind estimation)

该程序能将GPS经度和纬度坐标转化为高斯平面坐标。(The program can transform the longitude and latitude into Gauss coordinate.)

车载设备向网络中心发送当前位置信息,网络中心收到数据后将数据保存到动态位置数据表中。(devices in car send current position data to network center,network center recieve these data and store it in database.)

说明：  matlab图像处理程序例集，供学习参考。(MATLAB image processing program example set for learning reference.)

说明：  水平集（level set）中快进算法（fast marching）算法的matlab工具箱，内容很全面。(Level Set (level set), Fast Forward algorithm (fast marching) algorithm m atlab Toolbox, which is very comprehensive.)

多个测GPS-RTK坐标，进行球心拟合，提高测量精度(A plurality of measuring GPS-RTK coordinates of the center fitting, improve the measurement accuracy)

以下为一般性带附件资料发贴选项： 【资料成文时间】：2005 【语言】：英文 【页数】：22×２ 【何人（公司）所著】：DirkW¨ubben 【文件格式】：pdf 【文件原名】：Channel Coding I Matlab solutions of the exercises (The following is a general information with an attachment Posted options: 【Data written Time】: 2005 【Language】: English 【Pages】: 22 × 2 【whom (company) book】: DirkW ¨ ubben】 【file formats: pdf Original】 【File: Channel Coding I Matlab solutions of the exercises)

研究了一种数字中频 GPS 信号生成方法。给出了数字中频信号数学模型，模型考虑了各种因素对信号的影响。通过导航电文分析，提出信号传播时延、多普勒频移以及信号入射方向的估计方法。给出了中频信号产生的流程，对其中时延的设置，信号的上变频、信号幅度设置以及方向信息的导入进行了阐述。对所生成的信号模型进行了仿真分析，给出了信号产生各个阶段的频谱，对所生成的信号进行了相关捕获。仿真结果表明频谱特征符合理论分析，能够被捕获并找出信号时延从而实现定位。证明该信号模型能作为信号源应用于 GPS接收机研制中。(】The paper discusses a digital IF GPS signal generation method, gives the mathematic model of digital IF signal. This mathematic model takes into account the influence of various factors. Based on analysis of the navigation data, the method to estimate signal propagation time, Doppler frequency shift and the coming angle of signal is proposed. The flow to generate IF signal is given, in which the setting of time delay, the up-frequency conversion, the setting of signal magnitude and the introduction of direction information are expounded. The signal generation model is simulated and analyzed, the spectrum of signal in each stage given, and the correlation capture of the generated signal also done. Simulation indicates that the spectrum is in accord with theoretical analysis the signal could be captured, thus find the time delay, accomplish the orientation. The signal model is proved applicable in the research and development of GPS receiver.)

在信号处理应用上的，求取一维信号曲线的盒维数(Obtaining box dimension of one dimensional signal curve)