ICD-GPS-200C

GPS测试仪，主要完成方位定位，经纬度，海拔，速度，时间(Positioning GPS tester to complete orientation, latitude, longitude, altitude, speed, time)

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GPS网平差C++程序，包含粗差探测、拟稳平差、已知点加权平差、自由网平差等各种算例(GPS network adjustment C++ procedures, including gross error detection, to be stable adjustment, known point weighting adjustment, free network adjustment, and other examples)

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.)

A Comprehensive Performance Comparison

这是研究欧洲DVB-T标准的一套合集，主要介绍了DVB-T单频网的同步技术，以及系统设计和实现。其中对DVB-T单频网进行了详细的讲解，对研究我国的数字电视广播技术也有很好的借鉴作用。(This is the study of the European DVB-T standard a collection, mainly introduces the synchronization technology of DVB-T single frequency network, and the system design and implementation. It make a detailed explanation of DVB-T single frequency network, also have a very good reference for digital television broadcast technology research in china.)

说明：  集中模糊度固定方法的整合，包含算例,说明，比较完整(several ways of lambda)

Globk软件是最著名的高精度的GPS网平差软件，用fortran软件开发，这里是最新版本的使用手册(Globk software is the most famous high-precision GPS network adjustment software, software development using fortran, this is the latest version of the user manual)

这是针对华为GSM/GPRS模块的GPS接收机空时抗干扰滤波技术研究(Research jamming GPS receiver space-time filtering technology)

说明：  实现GPS信号的无码捕获及多普勒频移获取(Acquisition of GPS Signal and Doppler Frequency Shift)