Method and device for reducing clock interference to radio frequency system, and communication equipment

Abstract

The invention discloses a method, a device and a communication device for reducing the interference of a clock to a radio frequency system, which are used for reducing the interference of a clock of the communication device to a radio frequency system. The method of reducing clock interference to the radio frequency system includes: obtaining the center frequency of the channel where the communication device establishes a connection with the network; obtaining the frequency of the bus clock of the communication device, which is called the secondary clock frequency; comparing the center frequency with the secondary clock frequency , to obtain a comparison result; when the comparison result is that the center frequency is a multiple of the secondary clock frequency, the frequency hopping of the bus clock is controlled so that the center frequency is not at the multiple of the secondary clock frequency. By adopting the technical scheme of the invention, the interference caused by the harmonic component of the secondary clock to the radio frequency system can be eliminated, and the reception performance degradation of the radio frequency system can be avoided.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, to a method and device for reducing clock interference to a radio frequency system, and communication equipment. Background technique [0002] The clock source will generate abundant harmonic components. When the RF system works on the multiplied channel of the clock source, the harmonic components of the clock source will have a serious impact on the receiving performance of the RF system. For example, see figure 1 , the mobile phone has a clock source 10 with a frequency of f0 (mostly 26MHz at present), and the f0 clock source generates 12 with a frequency of f1 (mostly 12MHz at present) and a frequency of f2 (mostly 13MHz at present) through clock distribution. The bus clock frequency fi of the camera, display screen, USB interface, memory, SD card and other devices is based on f1 or f2 as the reference clock source, and is obtained through frequency multiplication by ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method, device and communication equipment for reducing the clock source interference to the radio frequency system, which are used to solve the problem in the prior art that the solution to the interference of the clock source to the radio frequency system is not ideal

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