发明授权
US09497048B2 Method and apparatus with improved estimation accuracy and robustness for fine frequency offset estimation in coherent receivers
有权
具有改进的相干接收机精细频率偏移估计的估计精度和鲁棒性的方法和装置
- 专利标题： Method and apparatus with improved estimation accuracy and robustness for fine frequency offset estimation in coherent receivers
- 专利标题（中）： 具有改进的相干接收机精细频率偏移估计的估计精度和鲁棒性的方法和装置
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申请号： US14978380申请日： 2015-12-22
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公开(公告)号： US09497048B2公开(公告)日： 2016-11-15
- 发明人: Mahdi Zamani , Zhuhong Zhang , Chuandong Li
- 申请人： Mahdi Zamani , Zhuhong Zhang , Chuandong Li
- 申请人地址： CN Guangdong
- 专利权人： Huawei Technologies Co., Ltd.
- 当前专利权人： Huawei Technologies Co., Ltd.
- 当前专利权人地址： CN Guangdong
- 代理机构： Gowling WLG (Canada) LLP
- 主分类号： H04L25/02
- IPC分类号： H04L25/02
摘要：
The present disclosure provides a method and system for fine estimation of a local oscillator frequency offset of a received signal at a coherent receiver, by evaluating the probability mass function (PMF) of the signal phase of output symbols at different frequencies. At frequencies other than the actual frequency offset, the signal phase is uniformly distributed in [−π,π] such that the summation of a function of PMF values where the function is convex or concave between 0 and 1 can be utilized to determine an a frequency offset to be used by the coherent receiver.
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