Patent ID: 6038435
Filing Date: 2000-03-14
Classification: H03G

Abstract:
A method of providing an AGC (automatic gain control) in a wideband receiver for a received composite RF (radio frequency) signal containing RF signals each having an RF bandwidth associated with a particular air interface standard, the method comprising prior to demodulation of the received composite RF signal the steps of:digitizing the received composite RF signal in the wideband receiver for producing digital samples;comparing an absolute value of each digital sample to a first predetermined reference level for producing an error signal;accumulating the error signal for a predetermined number of the digital samples defining a sample window;for each contiguous sample window;calculating an attenuation adjustment in proportion to the accumulated error signal by considering only digital samples with an absolute value above the first predetermined reference level;if the accumulated error signal is greater than zero, summing the attenuation adjustment with a previously calculated receiver gain setting to provide an updated receiver gain setting; andapplying the updated receiver gain setting in the wideband receiver.