Title:
OFDM受信機
Document Type and Number:
Japanese Patent JP4399447
Kind Code:
B2
Abstract:
The present invention provides an OFDM receiver having a level control section comprising comparators which respectively compare a first signal outputted from an ADC with threshold values, counters which respectively count the frequencies with which the level of the first signal exceeds the threshold values, based on second and third signals corresponding to the results of comparison by the comparators, a moving average unit which calculates an average value of the level of the first signal lying in a predetermined period, based on fourth and fifth signals corresponding to the frequencies counted by the these counters, and a DAC which generates a gain control signal for controlling an AMP in such a manner that the average level of the first signal outputted from the ADC becomes a predetermined value, according to a sixth signal calculated by the moving average unit.
Inventors:
Masato Tanaka
Hirotsugu Akahori
Hirotsugu Akahori
Application Number:
JP2006292398A
Publication Date:
January 13, 2010
Filing Date:
October 27, 2006
Export Citation:
Assignee:
oki Semiconductor Co., Ltd.
International Classes:
H03G3/20; H04J11/00
Domestic Patent References:
| JP2007295111A | ||||
| JP2000134133A | ||||
| JP2004364124A | ||||
| JP2004282420A | ||||
| JP2002077101A | ||||
| JP2002246860A | ||||
| JP2002368715A | ||||
| JP2002300135A | ||||
| JP2005229533A |
Attorney, Agent or Firm:
Kakimoto Yasunari