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    • 3. 发明申请
    • METHOD AND SYSTEM FOR MEASURING RECEIVER MIXER IQ MISMATCH
    • 用于测量接收机混合器智能失真的方法和系统
    • US20110312292A1
    • 2011-12-22
    • US13221276
    • 2011-08-30
    • Larry Y.L. MoAkira Yamanaka
    • Larry Y.L. MoAkira Yamanaka
    • H04W24/00
    • H03D3/009H04B1/30
    • A system for correcting a mismatch between an in-phase path and a quadrature path in a receiver, the system including one or more processors operable to correlate a received signal with a complex training sequence having periodic, uncorrelated real and imaginary components, thereby generating a complex correlation. The one or more processors estimate a gain mismatch and a phase mismatch based on the complex correlation over a unit period. The one or more processors control a first receive filter in the in-phase path via a first digital-to-analog controller, and control a second receive filter in the quadrature path via a second digital-to-analog controller. The cutoff frequency and bandwidth of the first receive filter is controlled independently of the second receive filter to enable the output of the first receive filter and the output of the second receive filter to be tightly matched.
    • 一种用于校正接收机中的同相路径和正交路径之间的失配的系统,所述系统包括一个或多个处理器,该处理器可操作以将接收的信号与具有周期性,不相关的实部和虚部的复数训练序列相关, 复杂相关。 一个或多个处理器基于单位周期的复相关估计增益失配和相位失配。 一个或多个处理器经由第一数模转换器控制同相路径中的第一接收滤波器,并经由第二数模转换器控制正交路径中的第二接收滤波器。 第一接收滤波器的截止频率和带宽独立于第二接收滤波器被控制,以使第一接收滤波器的输出和第二接收滤波器的输出紧密匹配。
    • 4. 发明申请
    • METHOD AND SYSTEM FOR MEASURING RECEIVER MIXER IQ MISMATCH
    • 用于测量接收机混合器智能失真的方法和系统
    • US20100015936A1
    • 2010-01-21
    • US12568927
    • 2009-09-29
    • Larry Y.L. MoAkira Yamanaka
    • Larry Y.L. MoAkira Yamanaka
    • H04B17/00
    • H03D3/009H04B1/30
    • A system for correcting an IQ mismatch in a receiver mixer is disclosed and may include one or more circuits that generate an IQ correlation with a training signal having periodic, uncorrelated I and Q signals. The one or more circuits may estimate a gain mismatch based on a power estimate of the periodic, uncorrelated I and Q signals over a unit period. The one or more circuits may estimate a phase mismatch based on the IQ correlation over the unit period, and may apply at least one correction parameter to the receiver mixer. The at least one correction parameter may be based on the gain mismatch estimate and the phase mismatch estimate. The one or more circuits may provide the training signal on a closed RF signal path between a transmitter and the receiver mixer, and may estimate the IQ mismatch iteratively.
    • 公开了用于校正接收机混合器中的IQ失配的系统,并且可以包括与具有周期性,不相关的I和Q信号的训练信号产生IQ相关性的一个或多个电路。 一个或多个电路可以基于在单位周期内的周期性,不相关的I和Q信号的功率估计来估计增益失配。 一个或多个电路可以基于单位周期的IQ相关来估计相位失配,并且可以将至少一个校正参数应用于接收机混频器。 所述至少一个校正参数可以基于增益失配估计和相位失配估计。 一个或多个电路可以在发射机和接收机混频器之间的封闭RF信号路径上提供训练信号,并且可以迭代地估计IQ不匹配。