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。

公开(公告)号：US20130039234A1

公开(公告)日：2013-02-14

申请号：US13639870

申请日：2010-10-15

申请人： Bin Li ,  Zhaohua Zeng

发明人： Bin Li ,  Zhaohua Zeng

IPC分类号： H04W72/04

CPC分类号： H04J3/16 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0689 ,  H04L1/0006 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06

摘要： The disclosure provides a downlink transmission method and an eNodeB in a multiple input multiple output system. The method includes: obtaining channel quality indication of a User Equipment (UE) to generate a channel condition indication value; obtaining channel rank indication of the UE to generate a channel correlation indication value; obtaining uplink channel impulse response estimation data of the UE to generate a channel variation state indication value; selecting a downlink transmission mode according to the channel condition indication value, the channel correlation indication value and the channel variation state indication value; transmitting data to the UE in the selected downlink transmission mode. Because of extracting information from a current channel as a basis of a subsequent selection of the downlink mode, the disclosure can greatly improve a resource utilization ratio of a system and realize a better wireless transmission effect.

摘要翻译： 本公开提供了在多输入多输出系统中的下行链路传输方法和eNodeB。 该方法包括：获取用户设备（UE）的信道质量指示，生成信道状态指示值; 获取所述UE的信道秩指示以产生信道相关指示值; 获取所述UE的上行链路信道脉冲响应估计数据，以产生信道变化状态指示值; 根据信道条件指示值，信道相关指示值和信道变化状态指示值选择下行链路传输模式; 在选择的下行链路传输模式下向UE发送数据。 由于从当前信道中提取信息作为后续选择下行链路模式的基础，本发明可以大大提高系统的资源利用率并实现更好的无线传输效果。

公开(公告)号：US07912154B2

公开(公告)日：2011-03-22

申请号：US11883188

申请日：2005-01-31

申请人： Zhaohua Zeng ,  Hai Jiang ,  Ping Li ,  Hongfeng Qin

发明人： Zhaohua Zeng ,  Hai Jiang ,  Ping Li ,  Hongfeng Qin

IPC分类号： H04L27/06

CPC分类号： H04B1/7105

摘要： A baseband processing method based on double sampling, including: subjecting a received signal to root raised cosine-filtering process; sampling said signal; conducting channel estimation for every user based on the sampled data; and conducting multi-user joint detection and demodulation for said data. Wherein, the step of sampling said signal includes the following steps: conducting double sampling for said signal, and the interval of the sampling being ½ chip; each chip selecting the average value of two sampling values as the sampling value of the chip; assembling the sampling value of every chip into a data stream. According to the present invention, in the case that the complexity of computation is not increased and only the memory space is doubled, the gain of the received signal in the system is improved effectively, especially when the synchronization of signals is bad, relatively large gain of the signals can be obtained, the system delay is reduced, and the real-time property of signal processing is improved. The method according to the present invention is suitable to the mobile communication system in a bad communication environment.

摘要翻译： 一种基于双采样的基带处理方法，包括：对接收信号进行根升余弦滤波处理; 采样所述信号; 基于采样数据对每个用户进行信道估计; 并对所述数据进行多用户联合检测和解调。 其中采样所述信号的步骤包括以下步骤：对所述信号进行双重采样，采样间隔为1/2芯片; 每个芯片选择两个采样值的平均值作为芯片的采样值; 将每个芯片的采样值组装成数据流。 根据本发明，在计算的复杂度不增加并且仅存储空间加倍的情况下，系统中的接收信号的增益被有效地提高，特别是当信号的同步不良时，增益相对较大 可以获得信号，系统延迟降低，信号处理的实时性提高。 根据本发明的方法在恶劣的通信环境中适用于移动通信系统。

公开(公告)号：US08724653B2

公开(公告)日：2014-05-13

申请号：US13639870

申请日：2010-10-15

申请人： Bin Li ,  Zhaohua Zeng

发明人： Bin Li ,  Zhaohua Zeng

IPC分类号： H04J3/00 ,  H04J3/16

CPC分类号： H04J3/16 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0689 ,  H04L1/0006 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06

摘要： The disclosure provides a downlink transmission method and an eNodeB in a multiple input multiple output system. The method includes: obtaining channel quality indication of a User Equipment (UE) to generate a channel condition indication value; obtaining channel rank indication of the UE to generate a channel correlation indication value; obtaining uplink channel impulse response estimation data of the UE to generate a channel variation state indication value; selecting a downlink transmission mode according to the channel condition indication value, the channel correlation indication value and the channel variation state indication value; transmitting data to the UE in the selected downlink transmission mode. Because of extracting information from a current channel as a basis of a subsequent selection of the downlink mode, the disclosure can greatly improve a resource utilization ratio of a system and realize a better wireless transmission effect.

摘要翻译： 本公开提供了在多输入多输出系统中的下行链路传输方法和eNodeB。 该方法包括：获取用户设备（UE）的信道质量指示，生成信道状态指示值; 获取所述UE的信道秩指示以产生信道相关指示值; 获取所述UE的上行链路信道脉冲响应估计数据，以产生信道变化状态指示值; 根据信道条件指示值，信道相关指示值和信道变化状态指示值选择下行链路传输模式; 在选择的下行链路传输模式下向UE发送数据。 由于从当前信道中提取信息作为后续选择下行链路模式的基础，本发明可以大大提高系统的资源利用率并实现更好的无线传输效果。

公开(公告)号：US20080310553A1

公开(公告)日：2008-12-18

申请号：US11883188

申请日：2005-01-31

申请人： Zhaohua Zeng ,  Hai Jiang ,  Ping Li ,  Hongfeng Qin

发明人： Zhaohua Zeng ,  Hai Jiang ,  Ping Li ,  Hongfeng Qin

IPC分类号： H03D1/00

CPC分类号： H04B1/7105

摘要： A baseband processing method based on double sampling, including: subjecting a received signal to root raised cosine-filtering process; sampling said signal; conducting channel estimation for every user based on the sampled data; and conducting multi-user joint detection and demodulation for said data. Wherein, the step of sampling said signal includes the following steps: conducting double sampling for said signal, and the interval of the sampling being ½ chip; each chip selecting the average value of two sampling values as the sampling value of the chip; assembling the sampling value of every chip into a data stream. According to the present invention, in the case that the complexity of computation is not increased and only the memory space is doubled, the gain of the received signal in the system is improved effectively, especially when the synchronization of signals is bad, relatively large gain of the signals can be obtained, the system delay is reduced, and the real-time property of signal processing is improved. The method according to the present invention is suitable to the mobile communication system in a bad communication environment.

摘要翻译： 一种基于双采样的基带处理方法，包括：对接收信号进行根升余弦滤波处理; 采样所述信号; 基于采样数据对每个用户进行信道估计; 并对所述数据进行多用户联合检测和解调。 其中采样所述信号的步骤包括以下步骤：对所述信号进行双重采样，采样间隔为1/2芯片; 每个芯片选择两个采样值的平均值作为芯片的采样值; 将每个芯片的采样值组装成数据流。 根据本发明，在计算的复杂度不增加并且仅存储空间加倍的情况下，系统中的接收信号的增益被有效地提高，特别是当信号的同步不良时，增益相对较大 可以获得信号，系统延迟降低，信号处理的实时性提高。 根据本发明的方法在恶劣的通信环境中适用于移动通信系统。