Frequency offset estimation method and device

A frequency offset estimation and frequency offset technology, applied in the field of mobile communication, can solve the problems of affecting the accuracy, rarely considering the channel effect, and the frequency offset estimation accuracy and frequency offset estimation range cannot be taken into account.

Active Publication Date: 2017-02-22
SPL ELECTRONICS TECH CO LTD +1
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  • Abstract
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Problems solved by technology

[0003] At present, the frequency offset estimation methods of related technologies have the following defects: 1) the accuracy of frequency offset estimation and the range of frequency offset estimation cannot be balanced; Offset estimation is interrelated and

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  • Frequency offset estimation method and device
  • Frequency offset estimation method and device
  • Frequency offset estimation method and device

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Embodiment Construction

[0044] This application provides a method and device for frequency offset estimation, which adopts a stepwise estimation method to realize frequency offset estimation, which can not only take into account the large range and high precision of frequency offset estimation, but also accurately correct and utilize the channel estimation. The frequency offset estimation takes into account the influence of channel conditions, and realizes the joint estimation of frequency offset and channel.

[0045] Such as figure 1 As shown, this application provides a frequency offset estimation method, which may include the following steps:

[0046] Step 101: Perform frequency offset estimation for the received signal to obtain a first frequency offset estimation result;

[0047] Step 102: Perform frequency offset compensation on the received signal using the first frequency offset estimation result, and use the received signal after frequency offset compensation to establish a likelihood function for...

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Abstract

The invention discloses a frequency offset estimation method and device. The method comprises the following steps of carrying out frequency offset estimation for a receiving signal to obtain a first frequency offset estimation result; utilizing the first frequency offset estimation result to carry out frequency offset compensation on the receiving signal and utilizing the receiving signal after frequency offset compensation to establish a likelihood function for a sending signal, a frequency offset and a channel impulse response; and completing secondary frequent offset estimation for the receiving signal through the likelihood function. According to the method and the device, the joint estimation of the frequency offset and the channel is realized, the larger range and the higher precision of the frequent offset estimation are considered, and the influence of the channel condition on the frequent offset estimation is considered.

Description

Technical field [0001] This application relates to the field of mobile communication technology, and in particular to a frequency offset estimation method and device. Background technique [0002] Modern mobile communication pursues faster transmission rate, better transmission quality, higher spectrum efficiency and larger system capacity. Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) is one of the implementations of multi-carrier transmission schemes. It is the least complex and most widely used multi-carrier transmission scheme. Due to its extremely high spectral efficiency, It has become one of the key technologies of the fourth generation of mobile multimedia communications. However, OFDM technology is more sensitive to frequency offset, and the generation of frequency offset will destroy the orthogonality between OFDM sub-carriers, and then cause inter-carrier interference. In order to suppress inter-carrier interference, it...

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Application Information

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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0014H04L27/266H04L27/2691H04L27/2695H04L2027/0026
Inventor 邵林庞浩刘毅俎云霄
Owner SPL ELECTRONICS TECH CO LTD
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