Wireless receiving device suppressing occurrence of...

Details Wireless receiving device suppressing occurrence of... Wireless receiving device suppressing occurrence of...

2004-12-09

2009-06-02

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Receivers

Automatic gain control

C375S316000, C375S329000, C375S331000, C455S234100, C455S232100, C455S230000, C455S245100, C330S254000

Reexamination Certificate

active

07542529

ABSTRACT:
An AGC processing portion receives a burst signal of each received frame, and measures its received power level to perform gain control of a variable gain amplifier. Unlike a conventional wireless receiving device, a digital signal from an A/D converter is directly supplied to the AGC processing portion, without passing through an FIR filter. Accordingly, the input timing for the AGC processing portion does not include a delay due to the FIR filter, and an amplitude value can be adjusted to be appropriate from the leading part of each frame, suppressing the occurrence of a reception error due to AGC processing.

REFERENCES:
patent: 7196579 (2007-03-01), Ozawa
patent: 2002/0003836 (2002-01-01), Azakami et al.
patent: 2003/0194981 (2003-10-01), Rimini et al.
patent: 05-327540 (1993-12-01), None
patent: 10-056343 (1998-02-01), None
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patent: 2001-168664 (2001-06-01), None
patent: 2002-077007 (2002-03-01), None
patent: 2003-110526 (2003-04-01), None
patent: 2003-115773 (2003-04-01), None
patent: 2003-158435 (2003-05-01), None
patent: 2003-158557 (2003-05-01), None
Numata Takayuki, Radio equipment and method for controlling gain thereof, Apr. 18, 2003, a translated copy of Japan Patent applicaiton 2003-115773.

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