基于FFT的伪随机码快速捕获设计与实现

Design and Implementation of Pseudo-random Code Acquisition Based on FFT

本文介绍了基于FFT的伪随机码快速捕获的原理,并且对快速捕获模块的核心单元,即采样率转换单元和FFT/IFFT计算单元的FPGA实现进行了详细论述。仿真和实现结果表明,此方法能快速地捕获扩频信号中的伪随机码相位。

This paper introduces the theory of Pseudo-random code acquisition based on FFT.The FPGA implementation of two most important modules, sampling rate conversion module and FFT/IFFT calculation module, is described in detail. Simulation results show that this method implements Pseudo-random code rapid acquisition and reasonable hardware resource utilization under low sig- nal-noise ratio and high data modulation rate.