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。

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：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：US08837614B2

公开(公告)日：2014-09-16

申请号：US13259606

申请日：2010-05-19

申请人： Ping Li ,  Hongfeng Qin

发明人： Ping Li ,  Hongfeng Qin

IPC分类号： H04L27/26 ,  H04L25/02

CPC分类号： H04L27/2656 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2662 ,  H04L27/2695

摘要： The present invention provides a pilot-based timing offset estimation apparatus and method. The timing offset estimation apparatus includes: a pilot bit channel estimation module, configured to acquire pilot bit frequency-domain channel estimation values of target users through calculation on respective sub-carriers of the target users according to received frequency-domain demodulation reference symbols and local frequency-domain demodulation reference symbols; and a timing offset estimation module, configured to respectively perform timing offset estimation for each target user by using phase differences among the pilot bit frequency-domain channel estimation values on the respective sub-carriers. The present invention performs timing offset estimation for multiple users on the basis of the received pilot sequences, therefore provides more accurate measurement values for timing offset compensation and timing offset reporting, so as to reduce the influence of the timing offset on the receiver performance.

摘要翻译： 本发明提供一种基于导频的定时偏移估计装置和方法。 定时偏移估计装置包括：导频比特信道估计模块，用于根据接收到的频域解调参考符号和本地的目的用户对各个子载波进行计算，获取目标用户的导频比特频域信道估计值 频域解调参考符号; 以及定时偏移估计模块，被配置为通过使用各个子载波上的导频位频域信道估计值之间的相位差来分别对每个目标用户执行定时偏移估计。 本发明基于接收到的导频序列对多个用户进行定时偏移估计，从而为定时偏移补偿和定时偏移报告提供更精确的测量值，以便减少定时偏移对接收机性能的影响。

公开(公告)号：US20120099631A1

公开(公告)日：2012-04-26

申请号：US13259606

申请日：2010-05-19

申请人： Ping Li ,  Hongfeng Qin

发明人： Ping Li ,  Hongfeng Qin

IPC分类号： H04B17/00

CPC分类号： H04L27/2656 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2662 ,  H04L27/2695

摘要： The present invention provides a pilot-based timing offset estimation apparatus and method. The timing offset estimation apparatus includes: a pilot bit channel estimation module, configured to acquire pilot bit frequency-domain channel estimation values of target users through calculation on respective sub-carriers of the target users according to received frequency-domain demodulation reference symbols and local frequency-domain demodulation reference symbols; and a timing offset estimation module, configured to respectively perform timing offset estimation for each target user by using phase differences among the pilot bit frequency-domain channel estimation values on the respective sub-carriers. The present invention performs timing offset estimation for multiple users on the basis of the received pilot sequences, therefore provides more accurate measurement values for timing offset compensation and timing offset reporting, so as to reduce the influence of the timing offset on the receiver performance.

摘要翻译： 本发明提供一种基于导频的定时偏移估计装置和方法。 定时偏移估计装置包括：导频比特信道估计模块，用于根据接收到的频域解调参考符号和本地的目的用户对各个子载波进行计算，获取目标用户的导频比特频域信道估计值 频域解调参考符号; 以及定时偏移估计模块，被配置为通过使用各个子载波上的导频位频域信道估计值之间的相位差来分别对每个目标用户执行定时偏移估计。 本发明基于接收到的导频序列对多个用户进行定时偏移估计，从而为定时偏移补偿和定时偏移报告提供更精确的测量值，以便减少定时偏移对接收机性能的影响。