公开(公告)号：US08774034B2

公开(公告)日：2014-07-08

申请号：US13258004

申请日：2010-06-04

申请人： Ping Li ,  Zhaohua Zeng ,  Hongfeng Qin ,  Weiju Sun ,  Lujia Han ,  Jie Lei

发明人： Ping Li ,  Zhaohua Zeng ,  Hongfeng Qin ,  Weiju Sun ,  Lujia Han ,  Jie Lei

IPC分类号： H04W24/00

CPC分类号： H04L27/2657 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2695

摘要： A frequency offset estimation and correction method in an orthogonal frequency division multiplexing (OFDM) system is disclosed in present invention, including: obtaining a pilot frequency domain channel estimation value of a target user, and smoothing the channel estimation value in frequency domain; obtaining the link quality state of a receiver; adopting a history smoothing algorithm or a multi-branch attempt algorithm to perform frequency offset estimation and frequency offset compensation, performing frequency domain demodulation for the data for which frequency offset compensation has been performed, and outputting a link quality state parameter; and updating the link quality state of the receiver according to the link quality state parameter, determining the output value of this frequency offset estimation and outputting a history frequency offset value required by next frequency offset estimation according to the determined output value of this frequency offset estimation. A corresponding apparatus is also disclosed in the present invention.

摘要翻译： 本发明公开了一种正交频分复用（OFDM）系统中的频率偏移估计和校正方法，包括：获得目标用户的导频频域信道估计值，并对频域中的信道估计值进行平滑; 获取接收机的链路质量状态; 采用历史平滑算法或多分支尝试算法进行频偏估计和频偏补偿，对已进行频偏补偿的数据进行频域解调，并输出链路质量状态参数; 根据链路质量状态参数更新接收机的链路质量状态，确定该频率偏移估计的输出值，并根据该频率偏移估计的确定的输出值输出下一个频率偏移估计所需的历史频率偏移值 。 在本发明中也公开了相应的装置。

公开(公告)号：US20120087263A1

公开(公告)日：2012-04-12

申请号：US13258004

申请日：2010-06-04

申请人： Ping Li ,  Zhaohua Zeng ,  Hongfeng Qin ,  Weiju Sun ,  Lujia Han ,  Jie Lei

发明人： Ping Li ,  Zhaohua Zeng ,  Hongfeng Qin ,  Weiju Sun ,  Lujia Han ,  Jie Lei

IPC分类号： H04W24/00 ,  H04L12/26

CPC分类号： H04L27/2657 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2695

摘要： A frequency offset estimation and correction method in an orthogonal frequency division multiplexing (OFDM) system is disclosed in present invention, including: obtaining a pilot frequency domain channel estimation value of a target user, and smoothing the channel estimation value in frequency domain; obtaining the link quality state of a receiver; adopting a history smoothing algorithm or a multi-branch attempt algorithm to perform frequency offset estimation and frequency offset compensation, performing frequency domain demodulation for the data for which frequency offset compensation has been performed, and outputting a link quality state parameter; and updating the link quality state of the receiver according to the link quality state parameter, determining the output value of this frequency offset estimation and outputting a history frequency offset value required by next frequency offset estimation according to the determined output value of this frequency offset estimation. A corresponding apparatus is also disclosed in the present invention.

摘要翻译： 本发明公开了一种正交频分复用（OFDM）系统中的频率偏移估计和校正方法，包括：获得目标用户的导频频域信道估计值，并对频域中的信道估计值进行平滑; 获取接收机的链路质量状态; 采用历史平滑算法或多分支尝试算法进行频偏估计和频偏补偿，对已进行频偏补偿的数据进行频域解调，并输出链路质量状态参数; 根据链路质量状态参数更新接收机的链路质量状态，确定该频率偏移估计的输出值，并根据该频率偏移估计的确定的输出值输出下一个频率偏移估计所需的历史频率偏移值 。 在本发明中也公开了相应的装置。