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Method, device and system for estimating frequency offset in OFDM system

A technology of frequency offset estimation and offset estimation, applied in the field of frequency offset estimation, which can solve the problems of poor practicability and low accuracy of frequency offset estimation

Active Publication Date: 2020-12-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems existing in the prior art, the present invention provides a frequency offset estimation method, device and system in an OFDM system to solve the technical problems of low accuracy and poor practicability of the frequency offset estimation in the prior art

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  • Method, device and system for estimating frequency offset in OFDM system
  • Method, device and system for estimating frequency offset in OFDM system
  • Method, device and system for estimating frequency offset in OFDM system

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Embodiment Construction

[0158] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0159] Before describing the embodiment of the frequency offset estimation method in the OFDM system of the present invention, the OFDM system structure of the embodiment of the present invention will be introduced first. see figure 1 , is a schematic structural diagram of the OFDM system provided by the present invention.

[0160] Th...

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Abstract

Disclosed are a frequency offset estimation method, apparatus and system in an OFDM system. The method involves receiving an orthogonal frequency division multiplexing signal, wherein the orthogonal frequency division multiplexing signal contains zero sub-carriers periodically set in a frequency domain space; and according to control information about the orthogonal frequency division multiplexing signal, establishing a signal matrix, and finally obtaining the frequency offset estimation value by observing and calculating the signal matrix. The orthogonal frequency division multiplexing signal is a signal periodically separated in a comb-shaped manner by zero sub-carrier groups, so that interference between sub-carriers is effectively reduced; a large number of sub-carriers may be included in a data range for frequency offset estimation so as to expand the observation dimension, and thus, by means of observation and calculation of a large amount of data, frequency offset estimation precision is guaranteed. In addition, during observation and calculation, by using a layer by layer observation method, each layer of observation and calculation has a rational data processing complexity and approaches a highly precise calculation result layer by layer. The present invention is highly precise and highly applicable.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a frequency offset estimation method, device and system in an OFDM system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology uses a set of orthogonal narrowband subcarriers to transmit business data in parallel, which can not only overcome the intersymbol interference caused by multipath effects, but also can It supports high-speed data services under the premise of complex channel equalization, so it is widely used in wired and wireless communication systems, such as DAB (Digital Audio Broadcasting, Digital Audio Broadcasting) standard, DVB (Digital Video Broadcasting, Digital Video Broadcasting) standard, IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) 802.11, 3GPP (The 3rd Generation Partner Project, 3rd Generation Mobi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/26
Inventor 牛凯张进年
Owner HUAWEI TECH CO LTD
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