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    • 9. 发明授权
    • Adaptive controller for linearization of transmitter
    • 发射机线性化的自适应控制器
    • US07251290B2
    • 2007-07-31
    • US10321011
    • 2002-12-16
    • Peter Zahariev RashevDavid M. ThollChristopher John Leskiw
    • Peter Zahariev RashevDavid M. ThollChristopher John Leskiw
    • H04K1/02
    • H03F1/3247H03F1/0277H03F3/72H03F2203/7215H03F2203/7236
    • A bank of complex gain elements is used to provide a step-wise approximation of an arbitrary complex-gain predistortion function for a nonlinear transmitter. The bank of gain elements is in an adaptive loop realizing adaptive control. The adaptive loop is closed between an Input of the gain bank and an output of the transmitter through a linear receiver at an adaptive controller composed of a bank of proportional-integral (PI) controllers. The real and imaginary parts of each predistortion gain element are controlled by a corresponding adaptive PI controller. The signals processed by the adaptive controller are represented in orthogonal coordinates in terms of real and imaginary number pairs of complex numbers. The adaptive controller achieves unconditionally stable operation independently from the arbitrary phase rotation in the input signal or the adaptive loop.
    • 一组复增益元件用于提供非线性发射机的任意复增益预失真函数的逐步逼近。 增益元素组在自适应循环中实现自适应控制。 在由比例积分(PI)控制器组组成的自适应控制器处,通过线性接收器在增益库的输入和发射机的输出之间关闭自适应环路。 每个预失真增益元件的实部和虚部由相应的自适应PI控制器控制。 由自适应控制器处理的信号以实数和虚数对复数表示在正交坐标中。 自适应控制器独立于输入信号或自适应环路中的任意相位旋转实现无条件稳定的操作。