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|1. (WO2018121111) METHOD AND DEVICE FOR ELIMINATING LOCAL OSCILLATION LEAKAGE|
|Title:||METHOD AND DEVICE FOR ELIMINATING LOCAL OSCILLATION LEAKAGE|
The invention relates to the field of mobile communication, and specifically, to a method and device for eliminating local oscillation (LO) leakage. The device for eliminating LO leakage comprises: a coupler used to perform an LO leakage signal extraction process on an up-conversion signal or a down-conversion signal output by a mixer to obtain an LO leakage signal; an amplitude detection and adjustment module used to adjust, according to an amplitude of the LO leakage signal, an amplitude of an LO signal to obtain an LO leakage amplitude cancellation signal equal to the amplitude of the LO leakage signal; and a phase detection and adjustment module used to adjust, according to a phase of the LO leakage signal, a phase of the LO leakage amplitude cancellation signal to obtain a LO leakage cancellation signal having a same amplitude as the LO leakage signal and being 180 degrees out of phase of the LO leakage signal.