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1. (WO2018121111) METHOD AND DEVICE FOR ELIMINATING LOCAL OSCILLATION LEAKAGE

Pub. No.:    WO/2018/121111    International Application No.:    PCT/CN2017/111020
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Nov 16 00:59:59 CET 2017
IPC: H04B 1/04
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: XIONG, Linjiang
熊林江
QU, Yuzhou
曲玉周
MA, Xingwang
马兴望
CHEN, Hao
陈豪
LIN, Jie
林洁
Title: METHOD AND DEVICE FOR ELIMINATING LOCAL OSCILLATION LEAKAGE
Abstract:
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.