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|1. (WO2016050062) PASSIVE INTER-MODULATION (PIM) INTERFERENCE CANCELLATION METHOD FOR RADIO FREQUENCY MODULE AND RELEVANT APPARATUS|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||PASSIVE INTER-MODULATION (PIM) INTERFERENCE CANCELLATION METHOD FOR RADIO FREQUENCY MODULE AND RELEVANT APPARATUS|
A Passive Inter-Modulation (PIM) interference cancellation method for a radio frequency module and a relevant apparatus. The relevant apparatus comprises a digital intermediate frequency unit in the radio frequency module, the radio frequency module and an FDD base station system. A PIM component in the radio frequency module is eliminated to a certain extent, and an interference of PIM to a receiving performance of the radio frequency module is reduced. In some feasible embodiments of the present invention, the digital intermediate frequency unit in the radio frequency module comprises: an acquisition sub-unit for acquiring a digital transmitting signal from a transmitting channel of the radio frequency module; a computation sub-unit for performing non-linear transformation on the digital transmitting signal to generate a cancellation signal for cancelling the PIM component; and a superposition sub-unit for reversely superposing the cancellation signal on a receiving channel of the radio frequency module to cancel the PIM component in a receiving signal.