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专利名称：Integrated circuits, communication units and
methods of cancellation of intermodulationdistortion
发明人：Patrick Pratt,William Plumb,Sophie Gault,Pei-Shiun Chung
申请号：US12704484申请日：20100211公开号：US08320868B2公开日：20121127
专利附图：
摘要：A wireless communication unit includes a transmitter for processing a baseband
transmit signal to produce a first radio frequency signal. A receiver is arranged to converta second radio frequency signal to a baseband receive signal, where the receiver has asummation module arranged to add a cancellation signal to the baseband receive signal.A selectivity element is arranged to couple the transmitter and the receiver to anantenna, where a reduced portion of the first radio frequency signal is introduced intothe second radio frequency signal thereby creating a second order inter-modulationdistortion component in the baseband receive signal. An adaptive estimator module has afilter for filtering the baseband receive signal to remove dc offsets associated with thesecond order inter-modulation distortion component and generate the cancellationsignal based on the baseband transmit signal and the filtered baseband receive signal forinputting to the summation module.
申请人：Patrick Pratt,William Plumb,Sophie Gault,Pei-Shiun Chung
地址：Cork IE,Cambridge GB,Cambridge GB,Taipei Hsien TW
国籍：IE,GB,GB,TW
代理人：Winston Hsu,Scott Margo
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