Patent ID: 7024169

Claim:
Ant AMPS receiver system, comprising: an antenna for receiving a radio frequency (RF) signal transmitted from a remote location; a direct converter for converting the received RF signal to a baseband signal; an analog-to-digital convert (ADC) for converting the baseband signal to a digital baseband signal; a digital variable gain amplifier (DVGA) for amplifying the digital baseband signal to generate an amplified digital baseband signal, the DVGA having a DVGA control input for adjusting a gain of the DVGA; an accumulator for calculating an average power of the amplified digital baseband signal over a time period; a controller for receiving the calculated average power and maintaining the average power to a constant set point by sending a DVGA gain control signal to the DVGA control input to adjust the gain of the DVGA; and a digital FM demodulator for demodulating the amplified digital baseband signal to retrieve a message signal.