Invention Grant
- Patent Title: Data demodulation from weak navigational satellite signals
- Patent Title (中): 弱导航卫星信号的数据解调
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Application No.: US11244436Application Date: 2005-10-04
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Publication No.: US07660373B2Publication Date: 2010-02-09
- Inventor: Zhike Jia , Chi-Shin Wang
- Applicant: Zhike Jia , Chi-Shin Wang
- Applicant Address: US CA Santa Clara
- Assignee: SiRF Technology, Inc.
- Current Assignee: SiRF Technology, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Pillsbury Winthrop Shaw Pittman LLP
- Main IPC: H04L27/06
- IPC: H04L27/06
Abstract:
A method to determine the polarity of navigation data from weak satellite signals is disclosed. After bit edge is detected, a method in frequency domain is used to determine the present bit polarity with the help of several prior data bits which are already known, is disclosed. The impact of residual frequency can be mitigated by frequency transform. This method is especially useful in removing the data modulation in the weak signal for subsequent long coherent integrations.
Public/Granted literature
- US20070230543A1 Data demodulation from weak navigational satellite signals Public/Granted day:2007-10-04
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