Receiver with an automatic gain control,申请号EP20020010952-传众专利搜索

Receiver with an automatic gain control

申请公布号：EP1363403(A1)

申请号：EP20020010952

申请日期：2002.05.16

申请公布日期：2003.11.19

申请人：

SONY INTERNATIONAL (EUROPE) GMBH

发明人：WILDHAGEN, JENS

分类号：H03M1/18;H04B1/10

主分类号：H03M1/18

摘要：An amplification and digitisation unit for a receiver, preferably for a radio receiver is disclosed, which comprises an amplifier (4) for amplifying a received signal, an automatic gain control unit for controlling the amplifier's gain, and an analogue-digital converter (8) for converting the amplified received signal into a digital signal for further processing. <??>According to the invention, the reception conditions are continuously monitored, in order to detect whether the received channel is a fading channel, or whether there exist strong adjacent channels that dominate the received signal. In case the received channel is a fading channel, the mean signal amplitude of the ADC's input signal is lowered in order to avoid saturation. In case there exist strong adjacent channels, the mean signal amplitude of the ADC's input signal is increased in order to fully exploit the dynamic range of the analogue-digital converter and to increase the neighbour channel suppression. <IMAGE>