In-vehicle radio apparatus

Details In-vehicle radio apparatus In-vehicle radio apparatus

2005-01-18

2008-03-11

Swarthout, Brent A. (Department: 2612)

Communications: electrical

External condition vehicle-mounted indicator or alarm

Highway information

C340S902000, C340S904000, C340S995200, C455S099000

Reexamination Certificate

active

07342509

ABSTRACT:
In an in-vehicle radio apparatus to radio-transmit information from a vehicle about to enter an intersection, the interference between a radio signal transmitted from the vehicle and a radio signal transmitted from another vehicle is suppressed. Further, an approach direction of the vehicle to the intersection can be accurately transmitted. In the radio apparatus to transmit a radio signal by using a spread spectrum method, it is determined that the vehicle has approached a first distance from the intersection, and based on the determination, a spread code corresponding to an approach direction of the vehicle to the intersection is allocated as a spread code used for transmission.

REFERENCES:
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patent: 6008741 (1999-12-01), Shinagawa et al.
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patent: 6788964 (2004-09-01), Satomura et al.
patent: 2005/0140523 (2005-06-01), Publicover
patent: A-2000-339591 (2000-12-01), None
patent: A-2002-260194 (2002-09-01), None

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