Method of determining true error vector magnitude in a wireless lan
    2.
    发明公开
    Method of determining true error vector magnitude in a wireless lan 有权
    一种用于确定在无线局域网的真实误差矢量幅度的方法

    公开(公告)号:EP1601129A1

    公开(公告)日:2005-11-30

    申请号:EP04253148.3

    申请日:2004-05-27

    发明人: Shafeeu, Hassan

    IPC分类号: H04L1/24

    CPC分类号: H04L27/364 H04L27/2601

    摘要: Systematic transmit IQ phase and amplitude imbalances in the transmit chain of a wireless local area network (WLAN) cause a corresponding systematic shift in the roots of a constellation diagram. Additional random phase noise in the transmit chain will cause a further Gaussian distribution of points in the constellation diagram about the systematically shifted roots. This random distribution represents a true error vector magnitude (EVM). By transmitting a known training sequence through the transmit chain, which it is known will be shifted to all of the systematically shifted roots in the constellation diagram, the Gaussian spread around those shifted roots can be analysed to determine the true EVM.

    摘要翻译: 系统的发射IQ相位和在无线局域网(WLAN)的发射链振幅失衡引起的星座图的根部对应的系统的转变。 在发射链附加随机的相位噪声将引起关于系统偏移根部的星座图点的再高斯分布。 这种随机分布darstellt真正的误差矢量幅度(EVM)。 通过发射链,其中已知将转移到所有的系统发送已知序列锻炼星座图中的移根,围绕这些转变根高斯价差进行分析,以确定我的真实EVM。