发明名称 |
AUTOMATIC RECEIVER CALIBRATION WITH NOISE AND FAST FOURIER TRANSFORM |
摘要 |
<p>The present invention provides a method for automatic calibration of a signal path in receivers (e.g., radio frequency receivers) using a noise (and not a specific test signal) as a source and a fast Fourier transform (FFT) of the noise for correcting various parameters related to an inphase/quadrature (I/Q) imbalance in a frequency domain. The present invention (method and apparatus) can provide detecting and correcting an I/Q phase error, an I/Q amplitude error, an absolute corner frequency of the analog baseband filter, and a relative corner frequency of the analog baseband filters just by using the noise as a stimuli. This calibration can be used for a factory calibration or it can be used as an on-site calibration for base stations. Mobile devices can calibrate themselves independently of their location. This reduces the requirements for the test equipment in the manufacturing and maintenance stages.</p> |
申请公布号 |
WO2007000632(A2) |
申请公布日期 |
2007.01.04 |
申请号 |
WO2006IB01379 |
申请日期 |
2006.05.26 |
申请人 |
NOKIA CORPORATION;NOKIA INC.;SEPPINEN, PAULI;KOSKELA, JULIUS;GUSTAFSSON, MIKAEL |
发明人 |
SEPPINEN, PAULI;KOSKELA, JULIUS;GUSTAFSSON, MIKAEL |
分类号 |
H04B17/00;H03D3/00;H04L27/14;H04L27/38 |
主分类号 |
H04B17/00 |
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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