基于CUDA的GPS信号快速捕获

为实现基于PC平台的GPS软件接收机C/A码信号快速搜索,提出了一种由GPU完成信号搜索计算的快速实现方法。该方法以基于FFT的码相位并行搜索算法为基础,通过CUDA编程,由GPU完成主要的计算任务,实现了信号搜索在GPU上的并行计算。最后,将该方法与在CPU上实现的捕获方法进行了比较测试,结果表明:新方法的捕获速度显著提高,冷启动条件下,搜索全部32颗卫星只需1.653秒,为GPS软件接收机的实时化提供了重要保证。

Fast-Acquisition of GPS Signal Based on CUDA

To realize Fast-Acquisition of the C/A code on PC-Based software GPS receiver,a new method for Fast-Acquisition realized on Graphic Processing Unit ( GPU) is presented. Based on a FFT-based acquisition algorithm,this method uses GPU and Computer Unified Device Architecture ( CUDA) programming model to achieve a speedup over a standard CPU. Compared with the traditional acquisition method realized on standard CPU,the new method runs remarkably fast and the acquisition of 32 satellites under the cold-start co...