Direct acquisition method of long PN-code based on the GPU

In order to solve the acquisition problem of long PN-code spread spectrum signals, the partly correlation code phase-space acquisition model and implementation method of the FFT are analyzed. In order to segment data processing tasks and make full use of GPU to speed up FFT, a partly overlapped segmentation acquisition method of long PN-code is researched. Implementations of a direct global searching method and a partly overlapped segmentation searching method based on the GPU are then proposed, which parallel search for code phase using the FFT method, and accelerate FFT using the GPU. Simulation results indicate that, compared to a CPU implementation method, the search speed of the direct acquisition method of long PN-code based on the GPU is improved significantly.