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    • 3. 发明公开
    • METHOD AND APPARATUS FOR CONTROLLING PHASE DELAY OFFSET POINT OF MODULATOR
    • VERFAHREN UND VORRICHTUNG ZUR STEUERUNG DESPHASENVERZÖGERUNGSVERSATZPUNKTESEINES MODULATORS
    • EP2557748A4
    • 2017-04-19
    • EP10848734
    • 2010-08-17
    • ZTE CORP
    • YI HONGCHEN JIANHUA
    • H04L27/20G02B26/06H04B10/50
    • H04L27/2071H04B10/5053H04B10/5057H04B10/5561H04L2027/0018H04L2027/0051
    • The present invention provides a method and an apparatus for controlling a phase delay offset point of a modulator. The method comprises: acquiring backlight detection current signals output from a modulator in different working states, and determining harmonic amplitude values of the backlight detection current signals corresponding to the different working states; determining a detection value of a phase delay offset point corresponding to the modulator according to the determined harmonic amplitude values; comparing the detection value with a set target value of the phase delay offset point, and controlling a position of the phase delay offset point corresponding to the modulator according to the comparison result. The accuracy of controlling the position of the phase delay offset point of the modulator and the performance of the Differential Quadrature Phase Shift Keying (DQPSK) modulation system are improved through the technical solution.
    • 本发明提供一种用于控制调制器的相位延迟偏移点的方法和装置。 该方法包括:获取在不同工作状态下从调制器输出的背光检测电流信号,以及确定对应于不同工作状态的背光检测电流信号的谐波振幅值; 根据确定的谐波振幅值确定与调制器相对应的相位延迟偏移点的检测值; 将检测值与相位延迟偏移点的设定目标值进行比较,并根据比较结果控制与调制器对应的相位延迟偏移点的位置。 通过技术方案,改善了调制器的相位延迟偏移点的位置精度和差分正交相移键控(DQPSK)调制系统的性能。