The present invention relates to the technical field of satellite communication, in particular to a frequency offset detection method, system, storage medium, and electronic device Background Technology: 2. With the expansion of communication services from maritime users to land mobile and aviation users, it was renamed as the International Mobile Satellite Organization (IMSO) in 1994, but its abbreviation remains inmarsat. The Inmarsat system can cover all regions within 76 degrees north and south latitude of the Earth, providing a variety of communication services, and undertaking the vast majority of current maritime communication services. In satellite mobile communication systems, the relative motion between satellites and mobile terminals can lead to Doppler effects. Therefore, it is necessary to analyze the Doppler frequency deviation and variation patterns of mobile terminals within the visible range of satellites, in order to compensate for the Doppler effect and improve communication quality. At the same time, based on cost considerations, the vast majority of receivers' crystal oscillator accuracy is not high enough, which can also cause clock drift frequency deviation issues. For example, the frequency deviation rate of quartz crystals is generally 0.25ppm. For an oscillator with a frequency of l1, 0.25ppm is equivalent to a frequency error of about 400Hz. This frequency error must also be taken into account when processing baseband signals

Technical implementation elements: 4. To solve the above technical problems, the present invention provides a frequency offset detection method, system, storage medium, and electronic device. 5. The technical scheme of a frequency offset detection method of the present invention is as follows: 6.s1. Pre correcting the initial frequency offset value of the detected signal to obtain the residual frequency offset range of the detected signal; 7. s2. Search and obtain the first maximum frequency point modulus of the signal to be detected within the residual frequency offset range based on the preset frequency offset search step and the preset time domain data length, and obtain the second maximum frequency point modulus of the signal to be detected based on the preset number of search frequency points and the first maximum frequency point modulus; 8. s3. Determine whether there is a residual frequency offset value in the detected signal based on the difference between the index value of the first maximum frequency point modulus and the index value of the second maximum frequency point modulus. If so, determine the final frequency offset value of the detected signal based on the initial frequency offset value and the residual frequency offset value. If not, determine the initial frequency offset value as the final frequency offset value of the detected signal. 9. The beneficial effects of a frequency offset detection method of the present invention are as follows: 10. The method of the present invention pre corrects the detected signal based on its initial frequency offset value, obtains the residual frequency offset range of the detected signal, and searches for the first maximum frequency point modulus value and the second maximum frequency point modulus value within the residual frequency offset range based on the preset frequency offset search step and the preset time domain data length, And determine whether there is a residual frequency offset value in the detected signal based on the difference between the index value of the first maximum frequency point modulus value and the index value of the second maximum frequency point modulus value. Therefore, the method of the present invention is simple, fast, and efficient. Through the synchronization and positioning process of the GNSS chip, a portion of the frequency offset value is first determined, and the frequency offset value is used for pre correction. Then, only within the residual frequency offset range, a dft scan is required to confirm the residual frequency offset value