卫星信号快速捕获在FPGA的实现

Implement of acquisition of satellite signal in FPGA

本文给出了用于低轨(LEO)卫星通信的双伪随机码直接序列扩频(DSSS)、QPSK调制下的信号多普勒频偏以及码相位二维捕获的检测策略,并给出了用于FPGA实现的系统结构,并对每个子模块给予了详细的介绍与说明,同时描述了整个算法的流程。

A new method of fast acquisition, which aim to LEO satellite DS communication system, is proposed. The strategy of detecting Doppler frequency-offset and PN code phase is introduced. The structure of FPGA is designed, and, in addition to the state flow of the arithmetic, each sub-module is also illuminated.