Pulse or digital communications – Receivers – Automatic gain control
Patent
1995-02-27
1997-08-19
Chin, Stephen
Pulse or digital communications
Receivers
Automatic gain control
4552341, H04B 106
Patent
active
056595824
ABSTRACT:
A receiver, an automatic gain controller suitable for the receiver, a control signal generator suitable for the automatic gain controller, a reception power controller using the automatic gain controller and a communication method using the receiver. The instantaneous power of a received signal output from a variable gain amplifier or attenuator is detected by a power detector. The detected instantaneous power is quantized by a comparator and filtered through a random walk filter. An up-down counter counts up or down in accordance with the increment signal or the decrement signal obtained by filtering. In this manner, error in the gain control of the variable gain amplifier or attenuator is obtained.
REFERENCES:
patent: 4807035 (1989-02-01), Sayliss
patent: 4935814 (1990-06-01), Omoto
patent: 5301364 (1994-04-01), Aiens et al.
patent: 5496488 (1996-03-01), Morgan et al.
Tseyoshi, Digital Filter Design, Jan. 25, 1986, pp. 22-23, 44-45.
Kojima Toshiharu
Uchiki Tatsuya
Chin Stephen
Kim Kevin
Mitsubishi Denki & Kabushiki Kaisha
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