Noise canceller device

a noise canceller and noise technology, applied in sustainable communication technology, climate sustainability, high-level techniques, etc., can solve the problems of deterioration of communication environment, difficult to remove interference signals by filters or the like, and interference signals that cannot be accurately and stably removed, etc., to achieve the effect of reducing interference signals, reducing interference, and improving accuracy
US20190319651A1Active Publication Date: 2019-10-17KOKUSA ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KOKUSA ELECTRIC CO LTD
Publication Date
2019-10-17

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Abstract

In a noise canceller device, interference signal adjustment units adjust delay, phase and amplitude of a signal received by a sub antenna under different conditions to obtain adjustment signals, and subtract the adjustment signals from a signal received by a main antenna to obtain differential signals. An average power calculation unit calculates an average power for each of the differential signals. An optimal condition search unit determines the values of delay, phase and amplitude that result in the minimum average power, and sets the values in an optimal interference signal adjustment unit. The optimal interference signal adjustment unit adjusts the signal received by the sub antenna using optimal values for delay, phase and amplitude to obtain an optimal adjustment signal. A cancellation unit subtracts the optimal adjustment signal from the signal received by the main antenna to remove interference signals, and outputs a desired signal to a host device.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a noise canceller device in a wireless system; and, more particularly, to a noise canceller device capable of removing interference signals from another system accurately and stably.BACKGROUND OF THE INVENTION

[0002] In a conventional wireless communication system, a desired signal interferes with a signal of another system, which may result in deterioration of a communication environment.

[0003] For example, in BS (Broadcasting Satellite) reception facilities having a BS antenna installed at each home, frequency conversion is often used to process a received signal. At that time, if radio waves leak from the reception facilities, interference may occur in a band of a cellular phone system.

[0004] A signal band of satellite broadcasting which becomes an interference signal is wider than the band of the cellular phone which is a desired signal and, thus, it is difficult to remove the interference signal by a filter or the like.[0...

Claims

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