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    • 3. 发明申请
    • I/Q IMBALANCE ESTIMATION AND COMPENSATION FOR A TRANSMITTER AND A RECEIVER
    • I / Q发射机和接收机的不平等估计和补偿
    • WO2010124298A2
    • 2010-10-28
    • PCT/US2010/032458
    • 2010-04-26
    • QUALCOMM IncorporatedMETREAUD, Leon T.INANOGLU, HakanZHANG, XiangdongCHEN, Zhenqi
    • METREAUD, Leon T.INANOGLU, HakanZHANG, XiangdongCHEN, Zhenqi
    • H04L27/00
    • H04L27/0014H04L27/364H04L27/3863H04L2027/0016
    • Techniques for performing inphase/quadrature (I/Q) imbalance estimation and compensation are described. In one exemplary design, I/Q imbalances in a receiver may be estimated by (i) applying a continuous wave signal at different frequencies to the receiver and (ii) processing I and Q input samples from the receiver to determine I/Q imbalances at different frequencies. In another exemplary design, I/Q imbalances may be estimated by (i) downconverting an input RF signal with an LO signal that is offset in frequency from the input RF signal, (ii) transforming I and Q input samples from the receiver to the frequency domain to obtain I and Q symbols, and (iii) determining I/Q imbalances based on the I and Q symbols. In one exemplary design, I/Q imbalances may be corrected by compensating for frequency-dependent and frequency-independent I/Q imbalances separately. I/Q imbalances in a transmitter may also be estimated and compensated.
    • 描述了执行同相/正交(I / Q)不平衡估计和补偿的技术。 在一个示例性设计中,可以通过(i)将不同频率的连续波信号应用于接收机来估计接收机中的I / Q不平衡,以及(ii)处理来自接收机的I和Q输入样本以确定I / Q不平衡 不同的频率。 在另一示例性设计中,I / Q不平衡可以通过以下方式来估计:(i)利用从输入RF信号偏移频率的LO信号来下变频输入RF信号,(ii)将I和Q输入样本从接收机变换到 频域以获得I和Q符号,以及(iii)基于I和Q符号来确定I / Q不平衡。 在一个示例性设计中,可以通过分别补偿频率相关和频率独立的I / Q不平衡来校正I / Q不平衡。 也可以估计和补偿发射机中的I / Q不平衡。
    • 4. 发明申请
    • I/Q IMBALANCE ESTIMATION AND COMPENSATION FOR A TRANSMITTER AND A RECEIVER
    • I / Q发射机和接收机的不平等估计和补偿
    • WO2010124298A3
    • 2011-04-21
    • PCT/US2010032458
    • 2010-04-26
    • QUALCOMM INCMETREAUD LEON TINANOGLU HAKANZHANG XIANGDONGCHEN ZHENQI
    • METREAUD LEON TINANOGLU HAKANZHANG XIANGDONGCHEN ZHENQI
    • H04L27/00H04L27/36H04L27/38
    • H04L27/0014H04L27/364H04L27/3863H04L2027/0016
    • Techniques for performing inphase/quadrature (I/Q) imbalance estimation and compensation are described. In one exemplary design, I/Q imbalances in a receiver may be estimated by (i) applying a continuous wave signal at different frequencies to the receiver and (ii) processing I and Q input samples from the receiver to determine I/Q imbalances at different frequencies. In another exemplary design, I/Q imbalances may be estimated by (i) downconverting an input RF signal with an LO signal that is offset in frequency from the input RF signal, (ii) transforming I and Q input samples from the receiver to the frequency domain to obtain I and Q symbols, and (iii) determining I/Q imbalances based on the I and Q symbols. In one exemplary design, I/Q imbalances may be corrected by compensating for frequency-dependent and frequency-independent I/Q imbalances separately. I/Q imbalances in a transmitter may also be estimated and compensated.
    • 描述了执行同相/正交(I / Q)不平衡估计和补偿的技术。 在一个示例性设计中,可以通过(i)将不同频率的连续波信号应用于接收机来估计接收机中的I / Q不平衡,以及(ii)处理来自接收机的I和Q输入样本以确定I / Q不平衡 不同的频率。 在另一示例性设计中,I / Q不平衡可以通过以下方式来估计:(i)利用从输入RF信号偏移频率的LO信号来下变频输入RF信号,(ii)将I和Q输入样本从接收机变换到 频域以获得I和Q符号,以及(iii)基于I和Q符号来确定I / Q不平衡。 在一个示例性设计中,可以通过分别补偿频率相关和频率独立的I / Q不平衡来校正I / Q不平衡。 也可以估计和补偿发射机中的I / Q不平衡。