Title:
衛星測位システムの初回測位時間を改善する方法およびシステム
Document Type and Number:
Japanese Patent JP2009537015
Kind Code:
A
Abstract:
A satellite positioning system (SPS) antenna aiding device ( 100 ) includes an SPS receiver ( 102 ), an environmental sensor ( 106 ) to determine a heading value, a tilt value, or an acceleration value, and a processor ( 104 ). The processor can be programmed to determine ( 306 ) heading, determine ( 304 ) an estimated direction of peak antenna gain in relation to satellites in view, and prioritize ( 308 ) acquisition attempts of a portion of satellites in view based on the estimated direction of peak antenna gain and environmental data. The processor can perform ( 310 ) a split search with correlators split between searches for satellites with assumed peak gain using a shorter dwell time and longer dwell time searches for satellites with lower gain. The device can electronically present ( 312 ) an orientation guide to a user based on the estimated direction of peak antenna gain and in view of the heading of the SPS receiver.
Inventors:
Huferkamp, Christie Ei.
Krug, Keith M.
Krug, Keith M.
Application Number:
JP2009509904A
Publication Date:
October 22, 2009
Filing Date:
March 29, 2007
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
G01S19/48; G01C21/00; G01S19/28; G01S5/14; G01S19/53
Attorney, Agent or Firm:
Atsushi Honda
Miho Ikegami
Miho Ikegami