A method and device for eliminating frequency offset kick

Abstract

The invention discloses a method and a device for eliminating frequency offset jump, and belongs to the field of mobile communication. The method comprises the following steps: performing frequency offset estimation on a symbol output by a phase-locked loop by tracking within a first time unit to obtain a first frequency offset estimation value of the first time unit; determining whether or not the frequency offset jump occurs on the symbol output by the phase-locked loop by tracking within the first time unit according to a second frequency offset estimation value of a second time unit and the first frequency offset estimation value of the first time unit, wherein the second time unit is ahead of the first time unit; and if so, eliminating frequency offset generated on the symbol output by the phase-locked loop by tracking within the first time unit by the frequency offset jump according to the first frequency offset estimation value of the first time unit and the second frequency offset estimation value of the second time unit. The device comprises a first acquisition module, a determination module and a first elimination module. Through adoption of the method and device, the frequency offset jump can be eliminated under the situation of not generating interference among users, and the system performance at a base station switching moment is enhanced.

Description

technical field

[0001] The invention relates to the field of mobile communication, in particular to a method and device for eliminating frequency offset jump. Background technique

[0002] With the continuous construction, opening and use of high-speed railways and expressways, mobile communication systems need to transmit information through multiple base stations along the high-speed railways and expressways and high-speed mobile user equipment. The shift is serious, and when the user equipment is handed over from one base station to another base station or from one RRU (Remote Radio Unit, remote radio unit) to another RRU, the frequency of the signal received by the user equipment using a directional antenna will be changed by f 0 change to f 0 +f max or by f 0 -f max change to f 0 , where f 0 is the transmit frequency of the base station, f max It is the maximum frequency offset caused by motion, that is, the signal received by the user equipment has a frequency o...

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