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1. 发明授权

US09276798B2 Non-recursive digital calibration for joint-elimination of transmitter and receiver I/Q imbalances with minimized add-on hardware 有权
标题翻译：非递归数字校准，用于通过最小化的附加硬件联合消除发射器和接收器I / Q失衡
公开(公告)号：US09276798B2
公开(公告)日：2016-03-01
申请号：US14226032
申请日：2014-03-26
申请人： UNIVERSITY OF MACAU
发明人： Wei-Han Yu , Chak-Fong Cheang , Ka-Fai Un , Pui-In Mak , Rui P. Martins
IPC分类号： H04L27/36
CPC分类号： H04L27/364
摘要： A digital calibration circuit is used to provide joint-elimination of transmitter and receiver I/Q imbalances. Digital I and Q quadrature signals are received and converted to analog I and Q quadrature signals on I and Q for transmission on output channels. An output mixer is used to convert the quadrature signals to an unbalanced RF output. An unbalanced RF signal is received selectively either externally or from the RF output using a source follower, and the received signal is mixed to provide analog I and Q quadrature signals, using a local oscillator (LO). The LO adds an additional 90 ° phase shift between I and Q quadrature channels of the unbalanced RF input. Parameter estimating the transmitted digital I and Q quadrature signals and providing estimations of I and Q quadrature imbalance conditions.
摘要翻译：数字校准电路用于提供发射器和接收器I / Q失衡的联合消除。数字I和Q正交信号被接收并转换成I和Q上的模拟I和Q正交信号，用于在输出通道上传输。输出混频器用于将正交信号转换为不平衡的RF输出。使用源极跟随器选择性地从外部或从RF输出端接收不平衡RF信号，并且使用本地振荡器（LO）将接收信号混合以提供模拟I和Q正交信号。 LO在不平衡RF输入的I和Q正交通道之间增加了一个额外的90°相移。参数估计发送的数字I和Q正交信号，并提供I和Q正交不平衡条件的估计。

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