Method and device for processing frequency deviation

Abstract

The invention discloses a method and a device for processing frequency deviation. The method comprises the following steps that: a terminal performs frequency deviation estimation according to a signal channel value to determine a first frequency deviation estimated value; the terminal performs the frequency deviation estimation according to demodulation data to determine a second frequency deviation estimated value; and the terminal calculates the frequency deviation difference value between the first frequency deviation estimated value and the second frequency deviation estimated value, compares the frequency deviation difference value with a frequency deviation difference threshold valve, and regulates the receiving frequency according to a compared result. According to the method and the device for processing the frequency deviation, the receiving frequency is regulated by combining estimated results of the demodulation data frequency deviation estimation and the signal channel frequency deviation estimation, and the demodulation performance can be effectively improved by giving consideration to the advantages and the disadvantages of both estimation methods when the frequencydeviation is estimated and combining the advantages of demodulation data frequency deviation estimation and the signal channel frequency deviation estimation.

Description

technical field [0001] The present invention relates to the communication field, in particular to a frequency offset processing method and device. Background technique [0002] With the rapid development of communication technologies, supporting normal communication in high-speed mobile scenarios is an urgent requirement of a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system. [0003] At present, the following two methods are mainly used to solve the problem of Doppler frequency shift in high-speed mobile scenarios: one is to estimate the frequency offset based on the demodulated data, also known as the small frequency offset estimation algorithm. The advantage of this algorithm is that the result is stable , the variance is small, and the disadvantage is that the estimation range is limited by the number of symbols, which cannot solve the instantaneous frequency offset reversal scenario that occurs during cell handover, cell selection, and cell resel...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the frequency offset estimation based on the demodulated data and the frequency offset estimation based on the channel cannot be taken into account in the related art, the present invention proposes a frequency offset processing method, which can take into account the pros and cons of the two estimation methods in the frequency offset estimation, effectively Improve the performance of adjusting the receiving frequency

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