发明申请
- 专利标题: DIRECT CONVERSION RECEIVER AND METHOD FOR CORRECTING PHASE IMBALANCE THEREIN
- 专利标题(中): 直接转换接收器和校正相位不平衡的方法
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申请号: US11933579申请日: 2007-11-01
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公开(公告)号: US20090116586A1公开(公告)日: 2009-05-07
- 发明人: Bernard Arambepola , Nick Cowley
- 申请人: Bernard Arambepola , Nick Cowley
- 申请人地址: US CA Santa Clara
- 专利权人: INTEL CORPORATION
- 当前专利权人: INTEL CORPORATION
- 当前专利权人地址: US CA Santa Clara
- 主分类号: H04B1/10
- IPC分类号: H04B1/10 ; H04L27/22
摘要:
A direct conversion receiver and a method for correcting phase imbalance therein is disclosed. An input signal is applied to an in-phase channel and a quadrature channel of the receiver. The input signal is processed by the direct conversion receiver to obtain an in-phase zero intermediate frequency (IF) signal in the in-phase channel and a quadrature zero-IF signal in the quadrature channel. The in-phase zero-IF signal and the quadrature zero-IF signal are filtered to obtain a fixed band signal. A phase imbalance correction value is obtained for the fixed-band quadrature zero-IF signal as a function of the frequency of the fixed-band in-phase zero-IF signal and the fixed-band quadrature zero-IF signal. The in-phase zero-IF signal and the quadrature zero-IF signal are sampled and the phase imbalance correction value is applied using an interpolation to the sampled quadrature zero-IF signal or to the sampled in-phase zero-IF signal to correct the phase imbalance in the direct conversion receiver.