Invention Grant
US08355466B2 Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points 有权
通过移动不正确估计的星座点,取消非线性功率放大器从接收信号引起的失真

Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points
Abstract:
A method and system are provided for reducing power amplifier induced distortion. Power amplifier induced distortion is iteratively estimated and cancelled. When the difference between the current estimated power amplifier distortion and the previous estimated power amplifier distortion is less than a convergence threshold, particular M-QAM constellation points that are still in error are determined A M-QAM constellation point correction routine is provided that can move the incorrectly estimated M-QAM constellation points that are in error towards their expected quadrants by generating updated M-QAM constellation points. The remaining estimated non-linear power amplifier induced distortion in the received signal can then be estimated and canceled.
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