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
- Patent Title: Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points
- Patent Title (中): 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
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Application No.: US12567505Application Date: 2009-09-25
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Publication No.: US08355466B2Publication Date: 2013-01-15
- Inventor: John Kleider , Anthony Smith
- Applicant: John Kleider , Anthony Smith
- Applicant Address: US AZ Scottsdale
- Assignee: General Dynamics C4 Systems, Inc.
- Current Assignee: General Dynamics C4 Systems, Inc.
- Current Assignee Address: US AZ Scottsdale
- Agency: Ingrassia Fisher & Lorenz, P.C.
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H04B7/24 ; H03K9/00

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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