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Frequency offset estimation method and device

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

Active Publication Date: 2013-03-13
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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  • Frequency offset estimation method and device
  • Frequency offset estimation method and device

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053]The invention is applicable to numerous general purpose or special purpose computing device environments or configurations. For example: personal computer, appliance computer, handheld or portable device, tablet-type device, multiprocessor device, distributed computing environment including any of the above, etc.

[0054] The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by ...

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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 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 may also be caused by the Doppler effect. The frequency offset may cause interference between carriers, especially in an OFDM (Orthogonal Frequency Division Multiplexing) communication system, the role of the frequency offset is particularly important. Therefore, estimating the frequency offset so that the frequency offset can be adjusted subsequently becomes an important means of processing 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 pilot symbols is mainly realized as follows: the pilots in two time slots (co...

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Application Information

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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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