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    • 5. 发明申请
    • DC OFFSET ESTIMATION
    • 直流偏移估计
    • WO2007057844A1
    • 2007-05-24
    • PCT/IB2006/054268
    • 2006-11-15
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PAYNE, Adrian Weston
    • PAYNE, Adrian Weston
    • H03D3/00
    • H03D3/008
    • A Bluetooth® 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.
    • 蓝牙增强数据速率接收机(1)具有DC偏移估计电路(9),其包括用于识别解调信号中的转折点并在这些转折点测量信号电平的检测器(10)。 检测器(10)丢弃测量的最大值水平,其不足以与先前最小值的水平和与先前最大值的水平没有充分差异的最小值水平不足。 检测器(10)也丢弃小于特定阈值的电平。 平均装置(11)计算由检测器(10)输出的每个相邻的最大和最小电平的平均值。 处理装置(12)选择所计算的平均值的高,低和中等值,并将DC偏移值估计为该组计算平均值的平均值。