Diversity receiving apparatus capable of preventing...

Details Diversity receiving apparatus capable of preventing... Diversity receiving apparatus capable of preventing...

2005-11-01

2005-11-01

Bocure, Tesfaldet (Department: 2631)

Pulse or digital communications

Receivers

Interference or noise reduction

C455S139000

Reexamination Certificate

active

06961394

ABSTRACT:
A diversity receiving apparatus comprises a plurality of antennas, a plurality of receiving circuits connected to the plurality of antennas, respectively, an adding unit for adding reception signals output from the respective receiving circuits, and a plurality phase shifting units for making phases of the reception signals to be input into the adding unit equal. A level comparing unit, for comparing the levels of the reception signals output from the respective receiving circuits, is provided. Phases of reception signals other than a maximum-level reception signal are controlled so as to have the same phase as the phase of the maximum-level reception signal, and the phase-controlled signals are input into the adding unit.

REFERENCES:
patent: 4334316 (1982-06-01), Tanaka
patent: 4373207 (1983-02-01), Hecken
patent: 5203023 (1993-04-01), Saito et al.
patent: 5513222 (1996-04-01), Iwasaki
patent: 2003-318857 (2003-11-01), None
Digital Musen Tsushin-no Henfukucho (Modulation/Demodulation in Digital Wireless Communication), written by Yoichi Saito, p. 189-191, Fig. 5.19.

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