发明名称 |
IQ mismatch correction circuit |
摘要 |
An IQ mismatch correction circuit comprises: a correction circuit which performs a correction process to I-phase and Q-phase input signals by using one pair of first- or higher-order digital filters; two or more control circuits which independently generate two or more control variables to derive two or more coefficients of transfer functions of the digital filters; and one or more pairs of analyzing filters which change frequency characteristics of the corrected I-phase and Q-phase output signals so that the frequency characteristics is different from those of the original signals. The first control circuit measures a temporally averaged IQ phase mismatch state between the I-phase and Q-phase output signals. The second control circuit measures a temporally averaged IQ phase mismatch state between output signals on I-phase and Q-phase sides of one pair of analyzing filters. These states are fed back to the digital filters as first and second control variables, respectively. |
申请公布号 |
US8422610(B2) |
申请公布日期 |
2013.04.16 |
申请号 |
US20090605719 |
申请日期 |
2009.10.26 |
申请人 |
SANTRAINE ARNAUD;RE PASCAL LO;SHARP KABUSHIKI KAISHA |
发明人 |
SANTRAINE ARNAUD;RE PASCAL LO |
分类号 |
H04B1/10 |
主分类号 |
H04B1/10 |
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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