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QAM receiver with quadrature error correction - uses decision error for in=phase and quadrature components to calculate error correction value
QAM receiver with quadrature error correction - uses decision error for in=phase and quadrature components to calculate error correction value
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机译:具有正交误差校正的QAM接收器-使用同相和正交分量的判决误差来计算误差校正值
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摘要
The receiver has a coefficient weighting circuit for weighting the in-phase and quadrature components of the received signal with respective coefficients dependent on the quadrature error. A correction circuit (KS) uses the decision errors (eI, eQ) of the in-phase and quadrature signal values to provide a correction value (Qs) for the quadrature error from the decision error gradients. Pref. the in-phase and quadrature components and the decision errors are combined via multipliers, adders and sign function operators to provide the correction value. ADVANTAGE - Simple circuit providing exact correction of quadrature error.
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