Radio broadcast receiver

Details Radio broadcast receiver Radio broadcast receiver

2008-07-15

2008-07-15

Phu, Sanh D (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

C455S138000, C455S139000, C455S101000, C455S273000, C455S276100, C375S134000, C375S135000, C375S136000, C375S137000, C375S139000

Reexamination Certificate

active

07400867

ABSTRACT:
A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a reception signal of a sub antenna is less than a predetermined threshold value, and when a difference in phase between the reception signal of the main antenna and the reception signal of the sub antenna exceeds another predetermined threshold value, a combination ratio of a combiner for combining outputs of a main tuner and of a sub tuner is set to 1:1, where in-phase combination type diversity is carried out. In other cases, the combination ratio of the combiner is switched between 1:0 and 0:1 depending on the occurrence of a multipath, where selection diversity is carried out.

REFERENCES:
patent: 5263180 (1993-11-01), Hirayama et al.
patent: 5321580 (1994-06-01), Backstrom et al.
patent: 5539781 (1996-07-01), Matsuura
patent: 6029056 (2000-02-01), Kiyanagi et al.
patent: 6115591 (2000-09-01), Hwang

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