Method for Detecting Ofdm Timing in Ofdm System
    11.
    发明申请
    Method for Detecting Ofdm Timing in Ofdm System 有权
    检测Ofdm系统中的时序的方法

    公开(公告)号:US20070268974A1

    公开(公告)日:2007-11-22

    申请号:US11573687

    申请日:2005-08-17

    IPC分类号: H04J11/00

    摘要: A scheme for detecting a symbol timing (synchronization) of an Orthogonal Frequency Division Multiplexing (OFDM) system in which a transmitting end inserts a Cyclic Prefix (CP) and/or a Cyclic Suffix (CS) in an OFDM symbol for transmission, and a receiving end uses a new timing metric to detect a timing (synchronization) of the OFDM symbol based on a maximum value of the timing metric, whereby when applying the method for detecting the symbol timing of the OFDM system according to the present invention, the symbol timing can be obtained more precisely, to thusly enable stabilizing of performances of the OFDM system.

    摘要翻译: 用于检测正交频分复用(OFDM)系统的符号定时(同步)的方法,其中发送端在OFDM符号中插入循环前缀(CP)和/或循环后缀(CS)以进行传输,以及 接收端使用新的定时度量来基于定时度量的最大值来检测OFDM符号的定时(同步),由此当应用根据本发明的用于检测OFDM系统的符号定时的方法时,符号 可以更精确地获得定时,从而能够稳定OFDM系统的性能。

    Packet transmission in a wireless communication system using multiple antennas
    12.
    发明申请
    Packet transmission in a wireless communication system using multiple antennas 有权
    在使用多个天线的无线通信系统中的分组传输

    公开(公告)号:US20060039299A1

    公开(公告)日:2006-02-23

    申请号:US11205816

    申请日:2005-08-17

    IPC分类号: H04L12/28 H04B7/005

    摘要: A method of retransmitting packet data in a wireless communication system comprises receiving a link map information element from a transmitting station having three antennas to achieve space time transmit diversity, wherein first, second and third packet data are transmitted from first, second and third antenna of the transmitting station, respectively. The method also comprises transmitting a non-acknowledgement signal to the transmitting station if at least one packet data from the transmitting station is not properly decoded. The method also comprises receiving the packet data from the transmitting station, wherein at least two of retransmitted packet data are transmitted from different antennas of the transmitting station, and one of retransmitted packet data is transmitted from the same antenna of the transmitting station. The retransmitted packet data are received with an information element comprising a retransmission count associated with a number of retransmission made by the transmitting station.

    摘要翻译: 一种在无线通信系统中重发分组数据的方法包括从具有三个天线的发射台接收链路映射信息元素以实现空间时间发射分集,其中第一,第二和第三分组数据从第一,第二和第三天线 发射台。 如果来自发射站的至少一个分组数据未被适当地解码,则该方法还包括向发射台发送非确认信号。 该方法还包括从发送站接收分组数据,其中至少两个重传的分组数据从发送站的不同天线发送,并且重传的分组数据之一从发送站的同一个天线发送。 重传的分组数据被接收到一个信息元素,该信息元素包括与由发送站发送的重传次数相关的重传计数。