| 摘要 |
A Bluetooth(R) enhanced data rate receiver (1) has a DC offset estimation circuit (9) comprising a detector (10) for identifying turning points in a demodulated signal and measuring the signal level at these turning points. The detector (10) discards measured levels of maxima that are not sufficiently different to a level of a preceding minimum and levels of minima that are not sufficiently different to a level of a preceding maximum. The detector (10) also discards levels that are smaller than certain thresholds. An averaging means (11) calculates the average of each adjacent maximum and minimum levels of the signal output by the detector (10). A processing means (12) selects a high, low and medium value of the calculated averages and estimates a DC offset value as the average of this set of calculated averages.
|
