摘要
GPS(Global Positioning System)在全球范围内得到了越来越广泛的应用,车载和手持市场的普及对GPS接收机提出了高灵敏度的要求。弱信号下的比特同步在GPS的接收机设计中是一个重点也是一个难点。本文分析了最大似然比特同步算法,给出了理论的性能分析和仿真结果。并且,提出了一种改进的比特同步技术,可以在不增加同步时间的情况下,大幅度减小误同步概率,这可以提高接收机的定位完好性。
GPS is widely used over world. Car and handset GPS receivers, which demand high sensitivity are in- creasing rapidly. Under weak signal environments, bit synchronization is very important and difficult in GPS receiv- er design. This paper analyzes maximum-likelihood bit synchronization algorithm, and gives out performance anal- ysis in theory and simulation result. Furthermore, this paper brings out an improved bit synchronization algorithm, which can decrease the error rate in same time, so the integrity of GPS receiver is enhanced.
出处
《电子器件》
CAS
2008年第6期1926-1928,共3页
Chinese Journal of Electron Devices
关键词
GPS
比特同步
弱信号处理
高灵敏度
GPS
bit synchronization
weak signal treatment
high sensitivity
