发明申请
- 专利标题: Apparatus and Method for Calibrating IQ Mismatch
- 专利标题(中): 用于校准IQ失配的装置和方法
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申请号: US11532101申请日: 2006-09-15
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公开(公告)号: US20070058754A1公开(公告)日: 2007-03-15
- 发明人: Ying-Yao Lin , Fong-Ching Huang
- 申请人: Ying-Yao Lin , Fong-Ching Huang
- 优先权: TW094131911 20050915
- 主分类号: H04L27/22
- IPC分类号: H04L27/22
摘要:
An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.
公开/授权文献
- US08325794B2 Apparatus and method for calibrating IQ mismatch 公开/授权日:2012-12-04