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A method and device for frequency offset estimation

A technology of frequency offset estimation and frequency offset, applied in multi-frequency code systems, baseband system components, etc., can solve the problem of inaccurate frequency offset estimation in LTE systems

Active Publication Date: 2015-08-12
WUHAN HONGXIN TELECOMM TECH CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a frequency offset estimation method to solve the technical problem that the estimation of the frequency offset is not accurate enough in the LTE system

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  • A method and device for frequency offset estimation
  • A method and device for frequency offset estimation
  • A method and device for frequency offset estimation

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Embodiment Construction

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0053] The present invention can be used in many general-purpose or special-purpose computing device environments or configurations. For example: personal computers, device computers, handheld or portable devices, tablet devices, multi-processor devices, distributed computing environments including any of the above devices or devices, and so on.

[0054] The invention can be described in the general context of computer-executable instructi...

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Abstract

The invention provides a frequency offset estimation method and device. Before frequency offset estimation, a first relationship between a stored frequency offset and a coefficient of a corresponding sliding filter and a second relationship between a pilot frequency signal and the coefficient of the sliding filter are obtained in advance. The frequency offset estimation method comprises the steps of: receiving the pilot frequency signal containing frequency offset; and obtaining a frequency offset of the pilot frequency signal containing the frequency offset according to the second relationship and the first relationship. According to the method and the device provided by the embodiment of the invention, through the second relationship between the pilot frequency signal and the coefficient of the sliding filter and the first relationship between the coefficient of the sliding filter and the frequency offset, which are obtained in advance, the frequency offset of the signal can be figured out according to the received pilot frequency signal, therefore, the influence on the frequency offset estimation, caused by change of channels in two time slot intervals, can be avoided, therefore, the estimated frequency offset is more accurate.

Description

Technical field [0001] The present invention relates to the field of network data processing, in particular to a frequency offset estimation method and device. Background technique [0002] In a communication system, the frequency offset is caused by the carrier frequency deviation between the transmitting end and the receiving end, and it may also be caused by the Doppler effect. Frequency offset may cause interference between carriers. Especially in OFDM (Orthogonal Frequency Division Multiplexing) communication systems, the role of frequency offset is particularly important. Therefore, the estimation of the frequency offset so that the frequency offset can be adjusted subsequently becomes an important processing method for the frequency offset. [0003] In the prior art, in the LTE (Long Term Evolution, Long Term Evolution) system, the first technical solution for estimating the frequency offset based on the pilot symbols is mainly implemented as follows: the pilots in the two ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 王达金邢永涛李萌姜韬
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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