发明名称 |
METHOD AND APPARATUS TO REMOVE EFFECTS OF I-Q IMBALANCES OF QUADRATURE MODULATORS AND DEMODULATORS IN A MULTI-CARRIER SYSTEM |
摘要 |
The present invention is a method and apparatus (Fig. 5) to remove the adverse effects due to the imbalance between inphase and quadrature channels for I-Q demodulators and modulators in multi-carrier systems. A first balancer (510) generates a first balancing signal from a first signal of a first index corresponding to a first frequency. A first combiner (560) cobines the first balancing signal and a second signal of a second index corresponding to a second frequency. The second frequency is symmetrical to the first frequency with respect to a center frequency in a multi-carrier composite signal. The first combiner (560) generates a first balanced signal corresponding to the second frequency. |
申请公布号 |
WO02056523(A2) |
申请公布日期 |
2002.07.18 |
申请号 |
WO2001US48680 |
申请日期 |
2001.12.13 |
申请人 |
4D CONNECT, INC.;GU, JIAN |
发明人 |
GU, JIAN |
分类号 |
H03C3/40;H03D3/00;H04L27/26;H04L27/36 |
主分类号 |
H03C3/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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