摘要
设计在高动态环境下工作的GPS接收机,其难点之一在于对卫星伪码的快速捕获。针对缩短GPS接收机捕获伪随机码时间的问题,本文在对GPS信号结构作出分析的前提下,介绍了时域滑动相关的常规捕获方法;提出了基于FFT的快速捕获技术,并在matlab环境下做了系统仿真,仿真结果显示捕获速度可以得到显著提高。
One of the difficulties of designing GPS receiver working under high dynamic circumstance is to fast acquire the satellite PN code. In this paper, the method of Sliding Window Correlation is analyzed. In order to shorten the PN code acquitting time, the scheme based on FFT is also provided. The method provided is efficiently used in the emulator system with matlab. The emulation results show the capturing speed can be significantly improved.
出处
《航空电子技术》
2006年第2期1-5,共5页
Avionics Technology
