AGC system, AGC method, and receiver using the AGC system

Details AGC system, AGC method, and receiver using the AGC system AGC system, AGC method, and receiver using the AGC system

2004-12-09

2009-02-24

Phu, Phuong (Department: 2611)

Pulse or digital communications

Receivers

Automatic gain control

C375S318000, C375S340000, C375S342000, C455S311000, C455S234200, C455S245100

Reexamination Certificate

active

07496163

ABSTRACT:
In a slot format of a received signal, AGC gain update timings (t1to t4) are shifted every time to disperse and reduce an influence of a noise attributable to a direct current component specific to direct conversion which is accompanied by AGC gain update. In particular, in the case where each of slots in the received signal includes an information portion (data) having a larger code correcting capability and an information portion having a smaller code correcting capability (TPC (transmission power control), TFCI (transport format combination indicator), PILOT), the AGC gain update timing is generated while being shifted in the former information portion, thereby reduce the influence of the noise. When the amount of shift of the AGC gain update timing is set to be larger than that of one symbol of the received signal, the influence of the noise accompanied by the AGC gain update is further reduced.

REFERENCES:
patent: 5361395 (1994-11-01), Yamamoto
patent: 2003/0064696 (2003-04-01), Akamine et al.
patent: 2003/0207674 (2003-11-01), Hughes
patent: 2004/0192236 (2004-09-01), Yang et al.
patent: 1324504 (2003-07-01), None
patent: 2002111764 (2002-04-01), None

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