公开(公告)号：EP1826977B1

公开(公告)日：2011-07-27

申请号：EP07250818.7

申请日：2007-02-28

Applicant: STMicroelectronics (Beijing) R&D Co. Ltd.

Inventor： Yiqun, Ge ,  Wuxian, Shi ,  Juan, Du

IPC: H04L27/26

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2684 ,  H04L27/2691

公开(公告)号：EP1826977A3

公开(公告)日：2008-05-21

申请号：EP07250818.7

申请日：2007-02-28

Applicant: STMicroelectronics (Beijing) R&D Co. Ltd.

Inventor： Yiqun, Ge ,  Wuxian, Shi ,  Juan, Du

IPC: H04L27/26

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2684 ,  H04L27/2691

Abstract: A method, and components for performing such method, is provided for synchronizing multiple user signals in a multi-user communication system. An interference matrix is generated based on time delay and frequency offset information for the active users accessing an OFDMA uplink receiver. User signals are received from the active users and are segmented into blocks, and the interference matrix is applied to each of the blocks. The received user signal is OFDM demodulated and unused sub-carriers are discarded. Typically, the method includes also applying a factorization matrix formed by factoring a correction matrix created from the interference matrix and an inverse matrix formed based on the factoring results to the user signal blocks, e.g., the correction step includes multiplying each of the blocks from the user signal by each of these three matrices. The corrected user blocks are then concatenated to form a corrected vector signal.

公开(公告)号：EP1826977A2

公开(公告)日：2007-08-29

申请号：EP07250818.7

申请日：2007-02-28

Applicant: STMicroelectronics (Beijing) R&D Co. Ltd.

Inventor： Yiqun, Ge ,  Wuxian, Shi ,  Juan, Du

IPC: H04L27/26

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2684 ,  H04L27/2691

Abstract: A method, and components for performing such method, is provided for synchronizing multiple user signals in a multi-user communication system. An interference matrix is generated based on time delay and frequency offset information for the active users accessing an OFDMA uplink receiver. User signals are received from the active users and are segmented into blocks, and the interference matrix is applied to each of the blocks. The received user signal is OFDM demodulated and unused sub-carriers are discarded. Typically, the method includes also applying a factorization matrix formed by factoring a correction matrix created from the interference matrix and an inverse matrix formed based on the factoring results to the user signal blocks, e.g., the correction step includes multiplying each of the blocks from the user signal by each of these three matrices. The corrected user blocks are then concatenated to form a corrected vector signal.

Abstract translation: 一种方法和用于执行这种方法的组件被提供用于在多用户通信系统中同步多个用户信号。 基于用于访问OFDMA上行链路接收机的活动用户的时间延迟和频率偏移信息生成干扰矩阵。 从活动用户接收用户信号，并将其分割为块，并且将干扰矩阵应用于每个块。 所接收的用户信号是OFDM解调的，并且未使用的子载波被丢弃。 通常，该方法还包括应用通过将从干扰矩阵产生的校正矩阵分解而形成的因子分解矩阵和基于因子分解结果形成的逆矩阵到用户信号块，例如，校正步骤包括将来自 用户信号通过这三个矩阵中的每一个。 然后校正的用户块被级联以形成校正的矢量信号。