Spurious emission interference suppressing method, spurious emission interference suppressing device and electronic device

Abstract

The invention discloses a spurious emission interference suppressing method, which can be used for suppressing a spurious emission interference signal of an electronic device. The method comprises the following steps: first of all, modulating an amplitude of a baseband signal to obtain a first modulation signal; then, carrying out down-conversion processing on the first modulation signal to obtain a mixed signal comprising the baseband signal and the spurious emission interference signal; after that, filtering the baseband signal in the mixed signal to obtain the spurious emission interference signal; then, carrying out phase reversal processing on the spurious emission interference signal to obtain a phase reversal spurious emission interference signal; then, carrying out up-conversion processing on the phase reversal spurious emission interference signal to obtain a second modulation signal; and at last, combining the second modulation signal and the first modulation signal to enable the spurious emission interference signal to offset the phase reversal spurious emission interference signal. By adopting the spurious emission interference suppressing method or the spurious emission interference suppressing device disclosed by the embodiment of the invention, spurious emission interference elements in the modulation signals can be effectively suppressed, thereby improving the quality of the modulation signals. And the invention further discloses the spurious emission interference suppressing device and the electronic device.

Description

technical field [0001] The invention relates to circuit stray interference suppression technology, in particular to a stray interference suppression method, a stray interference suppression device and an electronic device. Background technique [0002] Noise signals such as spurious interference may appear in the radio frequency circuit. Spurious interference can be divided into out-of-band and in-band. Usually, out-of-band spurs are located outside the system frequency band and will not affect the system. However, the National Radio Commission will control spectrum resources, so the out-of-band spurious indicators The requirements of the national non-committee must be met so that it will not affect other systems or equipment. In-band spurious and interference signals can already affect the normal operation of the system, and cannot be suppressed by filters. Stronger spurious or interference signals may also cause the in-band spectrum template to fail to meet the requiremen...

AI Technical Summary

Problems solved by technology

In-band spurious and interference signals can already affect the normal operation of the system, and cannot be suppressed by filters. Stronger spurious or interference signals may also cause the in-band spectrum template to fail to meet the requirements of the National Radio Commission, resulting in The product cannot be listed

In addition, although out-of-band spurs and interference will not directly affect the normal operation of the system, once intermodulation occurs with other signals, the in-band component of the system may be generated, thereby affecting the system operation

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