发明名称 |
MIRROR SIGNAL IQ-IMBALANCE CORRECTION |
摘要 |
A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal produced in the receiver from the conveyed Test Signal can be measured. In the absence of an IQ-imbalance, the Test Signal can be completely eliminated in the receiver and the corresponding measured power of the produced signal can be minimized. Accordingly, a two dimensional algorithm is described for calibrating a receiver and correcting the IQ-imbalance by adjusting the phase and gain difference between the I and Q channels in the receiver based on the measured power of the signal produced in the receiver. |
申请公布号 |
US2014161168(A1) |
申请公布日期 |
2014.06.12 |
申请号 |
US201313960584 |
申请日期 |
2013.08.06 |
申请人 |
SiTune Corporation |
发明人 |
Mehrmanesh Saeid;Mesgarpour Vahid;Khoshgard Mahdi |
分类号 |
H04L1/20 |
主分类号 |
H04L1/20 |
代理机构 |
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代理人 |
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主权项 |
1. A system comprising:
a low-IF receiver configured to be tunable for selected channels; a synthesizer configured to produce a Test Signal in mirror frequencies for a selected channel and for conveying the Test Signal to the receiver; and an IQ Imbalance Estimator configured for estimating a phase imbalance and a gain imbalance in the receiver based on a signal produced in the receiver from the Test Signal.
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地址 |
San Jose CA US |