Fast frequency offset calibration method and device for radio frequency module, equipment and medium

Abstract

The invention discloses a rapid frequency offset calibration method for a radio frequency module, relates to the technical field of communication, aims to realize rapid frequency offset calibration ofa wireless radio frequency module and ensure the consistency of frequency offset calibration, is suitable for batch test, and comprises the following steps: receiving a frequency offset calibration instruction; controlling a radio frequency module to output an external crystal oscillator frequency according to the frequency offset calibration instruction; sampling the frequency of the external crystal oscillator to calculate real-time frequency offset, and modifying a register value of the external crystal oscillator based on the real-time frequency offset to complete frequency offset calibration. The invention further discloses a rapid frequency offset calibration device for the radio frequency module, electronic equipment and a computer storage medium.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device, equipment and medium for fast frequency offset calibration of a radio frequency module. Background technique [0002] As we all know, the wireless RF modules on the market all have different channel numbers, for example, the mainstream 2.4GHz wifi module has 14 channels, and the Bluetooth module has 40 / 80 channels. Each channel has a center frequency point, and there is a certain bandwidth between adjacent channels. [0003] Therefore, in the process of R&D and marketization of wireless RF modules, an important parameter index cannot be avoided, which is the offset of the RF center frequency point of the module, that is, frequency offset. In order to ensure normal RF communication, the industry standard The requirement is that the frequency offset of the corresponding frequency point is ≤±20ppm. If the frequency offset of the center frequency po...

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Problems solved by technology

[0006] 1. If the number of RF modules to be tested is large, the number of instruments required for testing is correspondingly large, but each instrument is expensive to purchase and occupies a large space. The method of testing one by one is obviously not realistic Production efficiency; therefore, the above two schemes are only applicable to the research and development stage, or the random testing process, and are not suitable for mass testing

[0007] 2. Each RF module needs to be connected to the port of the instrument in a specific way when testing the frequency deviation, so special tooling is required, the operation is very inconvenient, and the labor cost will be significantly increased

[0008] 3. The above two solutions can only be used to test the frequency offset. If the RF module does not meet the frequency offset standard, it can only be intercepted but cannot be automatically calibrated

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