SIMD指令函数包，对速度有要求的朋友赶快下，里面有FFT函数，比普通指令要快接近4倍。可用在GPS的数据密集运算中，可以达到实时运行。-SIMD instruction function, package, asked a friend of the speed quickly, the inside FFT function, than the average close to 4 times faster instruction. Can be used in GPS, data-inte

GPS定位中调用的选星子程序，依据每颗卫星贡献的GDOP值的大小进行选星，其中又分为递推选星和直接选星。考虑到机动载体存储空间限制，选星为4颗或6颗。而6颗卫星的GDOP值更接近所有卫星时的值，且计算量小。-GPS positioning called planetesimals selection process, based on the contribution of each satellite GDOP value of the selected size of stars, whic

MATLAB仿真，包括CBOC信号产生以及通过锁相环实现信号跟踪，可直接运行！ 接近工程实现思路，可用于fpga实现前功能仿真。((MATLAB simulation, including CBOC signal generation, and through the phase-locked loop to achieve signal tracking, can be directly run.))

该MATLAB程序确定用于非精确接近飞行阶段的接收机自主完整性监测（RAIM）基线标准算法（恒速率算法）和指定的输入数据集的可用性和故障标志（故障检测）。(This MATLAB program determines availability and failure flags (fault detection) for the Receiver Autonomous Integrity Monitoring (RAIM) baseline standard algorithm (constan