Matsushita Electric Industrial Co., Ltd.

Kouta Okada

Kenichi Nakano

Kazuhiko Ikeda

Makoto Taromaru

Kenji Sakanashi

Taro Ura

Keiichi Zenmyo

Tetsuya Matsuoka

Takayoshi Murahashi

A diversity receiver with simplified construction, excellent receiving signal quality even with very low fading speeds wherein, on the basis of a signal from a receiving unit capable of detecting the receiving signal intensity, an antenna changeover is effected when the receiving signal intensity falls below a changeover threshold value. When, at the termination of a first lapse time from the first antenna changeover, the receiving signal intensity is below that immediately before the first antenna changeover, an antenna changeover is again effected and any antenna changeover is prevented from being effected for a second lapse time from the second changeover. The second lapse time is set to be longer than the first lapse time.

Diversity receiver

The present invention relates to a navigation sppratus for finding a vehicle location by calculating on the basis of an output data of an acceleration detecting means for detecting a vehicle acceleration. The navigation apparatus provides at least one acceleration detecting means for detecting a vehicle acceleration and stop judge means for judging a vehicle stopping state from the output variation of the acceleration detecting means.

Navigation apparatus for a vehicle

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Kasuga, Japan

Kouta Okada