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Frequency adjustment method and device for crystal oscillator, storage medium and electronic equipment

A frequency adjustment, crystal oscillator technology, applied in the field of communication, can solve the problems of system performance impact, affecting system receiving performance, reducing system throughput, etc.

Active Publication Date: 2020-01-03
BEIJING XIAOMI PINECONE ELECTRONICS CO LTD
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Problems solved by technology

[0002] In wireless terminals, the crystal oscillator is usually used to generate the working clock of the system, but the output frequency of the crystal oscillator has a certain frequency deviation due to the influence of environmental changes, which affects the receiving performance of the system
For example, frequency deviation will introduce Inter Carrier Interference (ICI) in an Orthogonal Frequency Division Multiplexing (OFDM) system, which will undoubtedly increase the bit error rate and reduce the system throughput, making the system performance is severely affected

Method used

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  • Frequency adjustment method and device for crystal oscillator, storage medium and electronic equipment
  • Frequency adjustment method and device for crystal oscillator, storage medium and electronic equipment
  • Frequency adjustment method and device for crystal oscillator, storage medium and electronic equipment

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Embodiment Construction

[0062] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0063] figure 1 It is a flow chart of a method for adjusting the frequency of a crystal oscillator according to an exemplary embodiment. Such as figure 1 As shown, the method may include the following steps.

[0064] In step 101, a current frequency offset estimate is obtained.

[0065] In the present disclosure, the method can be applied to an automatic frequency control system (ie, an AFC system). The current frequency offset estimate may be an estimated value of the instantaneous frequency offset obtained at the current moment between the user terminal and the base station. Exemplarily, the current frequency offset estimation can be obtained through a...

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Abstract

The invention relates to a frequency adjustment method and device for a crystal oscillator, a storage medium and electronic equipment. The frequency adjustment method comprises the following steps: acquiring current frequency offset estimation; carrying out smoothing processing on the current frequency offset estimation to obtain smoothed frequency offset estimation; smoothing the variance of thecurrent frequency offset estimation to obtain a smoothed frequency offset estimation variance; and determining a frequency offset adjustment amount according to the smoothed frequency offset estimation and the smoothed frequency offset estimation variance. Therefore, under different frequency offset estimation conditions, the frequency offset of the crystal oscillator can be steadily and effectively controlled within a small range, and the throughput rate and the performance of the system are improved.

Description

technical field [0001] The present disclosure relates to the communication field, and in particular, relates to a frequency adjustment method, device, storage medium and electronic equipment for a crystal oscillator. Background technique [0002] In a wireless terminal, a crystal oscillator is usually used to generate the working clock of the system, but the output frequency of the crystal oscillator has a certain frequency deviation due to the influence of environmental changes, which affects the receiving performance of the system. For example, frequency deviation will introduce Inter Carrier Interference (ICI) in an Orthogonal Frequency Division Multiplexing (OFDM) system, which will undoubtedly increase the bit error rate and reduce the system throughput, making the system Performance is severely affected. Therefore, it is necessary to control the precision of the clock frequency output by the crystal oscillator within a certain range. Usually, wireless terminals adopt ...

Claims

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Application Information

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IPC IPC(8): H03J7/04
CPCH03J7/045
Inventor 邓祝明许百成
Owner BEIJING XIAOMI PINECONE ELECTRONICS CO LTD
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