Invention Grant
US08384592B1 FFT based acquisition techniques for satellite based navigation systems
有权
基于FFT的基于卫星导航系统的采集技术
- Patent Title: FFT based acquisition techniques for satellite based navigation systems
- Patent Title (中): 基于FFT的基于卫星导航系统的采集技术
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Application No.: US12570942Application Date: 2009-09-30
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Publication No.: US08384592B1Publication Date: 2013-02-26
- Inventor: Philip Crary , Qinfang Sun
- Applicant: Philip Crary , Qinfang Sun
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: DeLizio Gilliam, PLLC
- Main IPC: G01S19/30
- IPC: G01S19/30 ; G01S19/24 ; G01S19/37
Abstract:
A satellite navigation receiver receives a combination of radio frequency signals from satellites in satellite navigation systems and process the radio frequency signals to calculate an approximate current location of the satellite navigation receiver. Satellite acquisition plays an important part in identifying the current location of the satellite navigation receiver. Acquisition involves identifying the satellites in the satellite navigation that can be used to provide navigation information. Fast Fourier transform based acquisition involves using FFT and subsequently inverse FFT (IFFT) to correlate a coarse acquisition (C/A) code transmitted by a satellite with a C/A code locally generated on the GPS receiver to identify and acquire a transmitting satellite.
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