Frequency offset compensation method and device

Abstract

The invention discloses a frequency offset compensation method, which comprises the following steps that: a base station performs frequency offset estimation on received uplink signals to obtain a frequency offset estimation result, and pre frequency offset compensation is performed on downlink signals according to the frequency offset estimation result; a terminal detects the frequency of the received downlink signals after the frequency offset compensation, the emission frequency of the uplink signals is determined according to the detected frequency of the downlink signals, and the uplink signals are emitted in the determined frequency; and a terminal side performs the pre frequency offset compensation by the same method. The invention also discloses a frequency offset compensation device, which comprises a frequency offset estimation module, a pre frequency offset compensation module and a frequency detection and frequency modulation module. The method and the device can effectively reduce the frequency offset of uplinks and downlinks, perform the frequency offset compensation of the uplinks and the downlinks, and not only reduce the relative frequency offset between the base station and the terminal, but also reduce frequency jump variable when the terminal switches between the base stations, so that both the base station and the terminal can correctly correct the receivedsignals to ensure communication quality.

Description

technical field [0001] The present invention relates to frequency offset compensation technology, in particular to a frequency offset compensation method and device. Background technique [0002] Code Division Multiple Access (CDMA, Code Division Multiple Access) has the advantages of large capacity, strong anti-multipath fading ability and high frequency band utilization, and has become the mainstream of the third-generation mobile communication wireless transmission technology, especially time-division synchronous code division multiple access. (TD-SCDMA, Time Division-Duplex Synchronous Code Division Multiple Access) and Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) systems are favored by the majority of users. [0003] With the continuous construction of expressways and the continuous acceleration of railways, high-speed transportation has begun to be applied on a large scale, and has made great strides forward. Along with this, t...

AI Technical Summary

Problems solved by technology

This solution is only a detection method of uplink frequency offset, and does not solve the problem of reducing frequency offset at the receiving end, and the complexity is high

[0012] In short, there is no method for frequency offset compensation for downlink signals in the prior art, and it cannot solve the problem of terminal frequency hopping

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