发明名称 |
Sideband suppression method and apparatus for quadrature modulator using magnitude measurements |
摘要 |
Systems and methods are described for a sideband suppression technique for quadrature modulation using magnitude measurements. Gain imbalance, phase imbalance, or both gain and phase imbalance are corrected in a quadrature modulator. Predetermined voltage levels are applied to one or both of the quadrature modulator input channels and resultant output magnitudes are measured. Then, a gain correction factor, a phase correction factor or both gain and a phase correction factors are determined as a function of the measured output magnitudes. Gain imbalance, phase imbalance or both gain and imbalance are then corrected using the gain and phase correction factors.
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申请公布号 |
US2004082305(A1) |
申请公布日期 |
2004.04.29 |
申请号 |
US20020280631 |
申请日期 |
2002.10.25 |
申请人 |
KIRSCHENMANN MARK A.;TALWALKAR SUMIT A. |
发明人 |
KIRSCHENMANN MARK A.;TALWALKAR SUMIT A. |
分类号 |
H04L27/36;(IPC1-7):H04B1/06;H04B7/00 |
主分类号 |
H04L27/36 |
代理机构 |
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地址 |
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