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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)

这是整套的ldpc-ofdm仿真模拟代码，可以运行的，输出的是误码率图像(This is the whole set of ldpc-ofdm simulation code, you can run the output image is the bit error rate)

说明：  可以使用的DSP，CSL支持库,下载下来就解压就可以添加使用后(CSL support library)

这是射线信道模型的代码。里面有多个m文件(This is the code for the ray channel model. There are multiple M files in it.)

说明：  图像压缩源程序，工具：MATLAB编写。里面有三种压缩算法(image compression source, tools : MATLAB prepared. There are three compression algorithm)

说明：  一种简单的GPS的C/A码及导航电文建模(GPS C / a code and navigation message modeling)

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum: (1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate. (2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve. (3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)

说明：  基于DSP实现脉冲压缩 MTI MTD，包含DSP实现结果与matlab理论结果误差分析(DSP-based realization of pulse compression MTI MTD, including DSP to achieve results with theoretical results of error analysis matlab)

说明：  基于SVD的海杂波抑制算法的程序，欢迎大家下载，谢谢。(Based on SVD sea clutter suppression algorithm procedures, welcome to download, thank you.)

该工程实现对单载波系统QPSK的频偏估计算法。调相信号在接收机相干解调时需要同频同相的参考载波，而发射机和接收机之间往往存在频率偏差，为了消除这种误差，必须在软件层面实现。使用了QPSK四相调制的信号特点进行载波频偏估计，经验证，效果较好。(This project implements frequency offset estimation algorithm for single carrier system QPSK. The phase modulation signal needs the same frequency reference carrier in the coherent demodulation of the receiver, and the frequency deviation often exists between the transmitter and the receiver. In order to eliminate this error, it must be implemented on the software level. The carrier frequency offset estimation is carried out by using the signal characteristics of QPSK four phase modulation.)