Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1991-08-01
1992-09-01
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
H04B 785, G01S 502
Patent
active
051443180
ABSTRACT:
An apparatus and method for navigating a vehicle using GPS (Global Positioning System) are disclosed in which a plurality of GPS antennae are installed on a plurality of positions, e.g., front and rear ends or left and right sides of the vehicle. A direction sensor for detecting a forward direction of the vehicle is installed. Also, a satellite arrangement calculating block for determining satellites from which electromagnetic waves can be received through the respective antennae on the basis of; orbit data on the satellites, the mounting arrangement of the GPS antennae, and the forward direction of the vehicle is included. A receive satellite selecting block for selecting the satellites required to calculate position from among the available satellites from which each GPS antennae can receive electromagnetic waves is installed, so that the receive satellites is previously determined, differently from a diversity method, so speedy and accurate measurement of the present position of the vehicle can be made.
REFERENCES:
patent: 4731613 (1988-03-01), Endo et al.
patent: 4743913 (1988-05-01), Takai
Lindenmeier et al "Preiswert und reaktionsschnell", Funkschau, 26, (1986), pp. 42-45.
Lindenmeier et al, "Leistungsfahigkeit von Mehrantennen-Diversity for den UKW-Rundfunk im Auto", Rundfunktechnische Mitteilungen, No. 5 (1987) pp. 221-228.
Blum Theodore M.
Nissan Motor Company Limited
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