US 2019/0165822 A1Published application

Method and apparatus for eliminating interference signal

AssigneeBeijing Xiaomi Mobile Software Co., Ltd.

InventorChaoxi CHEN

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Abstract

A method for reducing or eliminating an interference signal includes: coupling a transmission signal transmitted from a transmission antenna of a communication device so as to obtain a reference signal; adjusting a power and a phase of the reference signal, superimposing a cancellation signal obtained by the adjusting with a received signal received by a reception antenna of the communication device, and coupling the obtained superposition signal so as to obtain an acquisition signal; and repeating the adjusting until a voltage value of the acquisition signal is smaller than or equal to a historical minimum voltage value, the received signal including a useful signal and an interference signal formed by the transmission signal at the reception antenna; and determining the obtained superposition signal as a received signal for eliminating interference of the receive antenna, the received signal for eliminating interference of the receive antenna including the useful signal.

Claims13

Dependent claims

An apparatus configured to reduce or eliminate an interference signal, the apparatus comprising:

a first coupler, an adjusting portion, a combiner, a second coupler, and a control portion, wherein:
the first coupler is coupled to a transmission antenna of a communication device, and is configured to couple a transmission signal transmitted by the transmission antenna of the communication device so as to obtain a reference signal;
the adjusting portion is coupled to the first coupler and configured to adjust a power and a phase of the reference signal to obtain a cancellation signal;
the combiner is coupled to the adjusting portion and a reception antenna of the communication device respectively, and is configured to superimpose the cancellation signal obtained by the adjustment with a received signal received by the reception antenna of the communication device to obtain a superposition signal, the received signal comprising a useful signal and an interference signal formed by the transmission signal at the reception antenna;
the second coupler is coupled to the combiner and configured to couple the obtained superposition signal so as to obtain an acquisition signal;
and
the control portion is coupled to the second coupler and the adjusting portion respectively, and configured to:
control the adjusting portion to adjust the power and the phase of the reference signal according to a voltage value of the acquisition signal until the voltage value of the acquisition signal is smaller than or equal to a historical minimum voltage value;
and
determine the obtained superposition signal as a received signal for reducing or eliminating interference of the reception antenna, the received signal for reducing or eliminating interference comprising the useful signal.

7 more elements

An apparatus configured to reduce or eliminate an interference signal, comprising:

a processor;
memory storing instructions executable by the processor;
wherein the processor is configured to:
couple a transmission signal transmitted from a transmission antenna of a communication device so as to obtain a reference signal;
adjust a power and a phase of the reference signal, superimpose a cancellation signal obtained by the adjustment with a received signal received by a reception antenna of the communication device, and couple the obtained superposition signal so as to obtain an acquisition signal;
and repeat this step until a voltage value of the acquisition signal is smaller than or equal to a historical minimum voltage value, the received signal comprising a useful signal and an interference signal formed by the transmission signal at the reception antenna;
and
determine the obtained superposition signal as a received signal for eliminating interference of the receive antenna, the received signal for eliminating interference of the receive antenna comprising the useful signal.

5 more elements

Dependencies are inferred from the claim text.