| 摘要 |
<p>The present invention relates to a method, an Automatic Gain Control (AGC) control unit and a receiver for Noise change output signalling. It also relates to an Adjustment Unit (AU), a receiver and a base band detector for adjustment of an Automatic Gain Control (AGC) output signal on the basis of the Noise change output signalling. In a first step a receiver receives (801) a communication input signal (s?n). In a second step at least one Automatic Gain Control (AGC) attenuator or amplifier in the receiver attenuates (802) the communication input signal. In a third step the receiver produces at least one AGC output signal. In a fourth step at least one AGC control unit in the receiver initiates (803) a changed gain setting on the receiver. This is made when the level of an AGC control unit input signal received by the unit has been below a first threshold level or above a second threshold level during a detection interval. What particularly characterizes the method is that the AGC control unit produces (804) a Noise change output signal.</p> |
