发明授权
- 专利标题: Continuous integration based satellite navigational signal acquisition
- 专利标题(中): 基于连续集成的卫星导航信号采集
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申请号: US11179353申请日: 2005-07-12
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公开(公告)号: US07180446B2公开(公告)日: 2007-02-20
- 发明人: Chi-Shin Wang , Zhike Jia , Hansheng Wang
- 申请人: Chi-Shin Wang , Zhike Jia , Hansheng Wang
- 申请人地址: US CA Santa Clara
- 专利权人: Centrality Communications, Inc.
- 当前专利权人: Centrality Communications, Inc.
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Orrick, Herrington & Sutcliffe LLP
- 主分类号: G01S5/14
- IPC分类号: G01S5/14
摘要:
A method and device to acquire navigational satellite signals combines non-coherent and coherent integrations and can efficiently acquire both strong and weak signals. Successive steps eliminate lower powered and less likely combinations of code offsets and carrier frequencies or dwells of a given satellite signal. Only remaining dwells then are correlated and integrated over larger time duration to obtain the most probable dwell or dwells, which results in reduced computational load. The selection of most likely dwells is based on Parseval's theorem on equivalence of power in time and frequency domains. An optimal estimator algorithm efficiently estimates the probable navigation data bits embedded in the received signal. In case of an ambiguity due to several possible dwells, the steps are repeated with a new set of signal samples.