RADIO RECEIVER AND METHOD FOR PRELOADING AN AVERAGE DC-OFFSET INTO A CHANNEL FILTER

摘要

A RADIO RECEIVER (200) AND METHOD (300) IS PROVIDED THAT EFFECTIVELY COMPENSATES FOR AN UNDESIRABLE DC OFFSET IN A DIGITAL SECTION OF THE RADIO RECEIVER (200) BY PRELOADING A FILTER WITH AN AVERAGE DC OFFSET BEFORE FILTERING A SIGNAL WITHIN THE FILTER. MORE SPECIFICALLY, THE RADIO RECEIVER (200) INCLUDES AN ANTENNA (202) FOR RECEIVING A RADIO SIGNAL, AND AN ANALOG SECTION FOR DEMODULATING THE RECEIVED RADIO SIGNAL INTO AT LEAST ONE BASEBAND SIGNAL. THE RADIO RECEIVER (200) ALSO INCLUDES AN ANALOG-TO-DIGITAL SECTION FOR CONVERTING THE AT LEASTONE BASEBAND SIGNAL INTO AT LEAST ONE DIGITAL BASEBAND SIGNAL. THE RADIO RECEIVER (200) FURTHER INCLUDES A PRELOADING SYSTEM FOR CALCULATING AN AVERAGE DC OFFSET USING A PREDETERMINED NUMBER OF SYMBOLS FROM THE AT LEAST ONE DIGITAL BASEBAND SIGNAL AND FOR PRELOADING A FILTER WITH THE CALCULATED AVERAGE DC OFFSET PRIOR TO FILTERING THE AT LEAST ONE DIGITAL BASEBAND SIGNAL IN THE FILTER.(FIG 2)