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    • 3. 发明授权
    • System and method for digital predistortion
    • 数字预失真的系统和方法
    • US09379744B2
    • 2016-06-28
    • US14488026
    • 2014-09-16
    • Honeywell International Inc.
    • Jan BilekAlfonso MalagaRadek ZarubaVit StencelMartin Mlaskac
    • H04B1/04H04L25/02
    • H04B1/0475H03F1/3241H03F1/3247H03F1/3258H03F3/195H03F3/245H03F2201/3212H03F2201/3233H04B2001/0425H04L25/0214H04L27/368
    • The radio system comprises a radio unit and an antenna unit coupled to the radio unit. The antenna unit is physically separate and located remote from the radio unit. The antenna unit further comprises a digital pre-distortion engine configured to pre-distort a modulated digital data signal; a digital to analog converter configured to convert the pre-distorted digital data signal to a pre-distorted analog data signal; and a power amplifier configured to amplify the pre-distorted analog data signal which distorts the pre-distorted analog data signal. The distortion introduced by the power amplifier is opposite to the pre-distortion introduced by the digital pre-distortion engine such that the pre-distortion introduced by the digital pre-distortion engine approximately cancels the distortion introduced by the power amplifier. The radio unit further comprises a coefficient computation engine configured to calculate coefficients used by the digital pre-distortion engine to pre-distort the modulated digital data signal.
    • 无线电系统包括无线电单元和耦合到无线电单元的天线单元。 天线单元在物理上是分离的并且位于远离无线电单元的位置。 天线单元还包括配置成预失真调制的数字数据信号的数字预失真引擎; 配置成将预失真数字数据信号转换为预失真模拟数据信号的数模转换器; 以及功率放大器,被配置为放大扭曲所述预失真模拟数据信号的预失真模拟数据信号。 由功率放大器引入的失真与由数字预失真引擎引入的预失真相反,使得由数字预失真引擎引入的预失真大致消除由功率放大器引入的失真。 无线电单元还包括系数计算引擎,其被配置为计算数字预失真引擎使用的系数,以使调制的数字数据信号预失真。