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Frequency offset estimation method, device, communication equipment and storage medium

A technology of frequency offset estimation and frequency offset, which is applied in the field of communication to achieve the effect of expanding the range

Active Publication Date: 2021-07-16
CHENGDU CORESAT TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is limited to the application scenarios of the frequency offset within one subcarrier, which has great limitations

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  • Frequency offset estimation method, device, communication equipment and storage medium
  • Frequency offset estimation method, device, communication equipment and storage medium
  • Frequency offset estimation method, device, communication equipment and storage medium

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0029] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The present invention relates to the field of communication technology, and provides a frequency offset estimation method, device, communication equipment, and storage medium. The method includes: when detecting that there is an access signal in the PRACH signal sent by the signal sending end, obtaining the main peak of the PRACH signal and the secondary peak, wherein the PRACH signal is composed of the same pilot sequence of a preset number; the first frequency offset is determined according to the peak value of the main peak and the peak value of the secondary peak; the frequency offset compensation is performed on the PRACH signal according to the first frequency offset to obtain A compensation sequence after frequency offset compensation; calculating a frequency offset between the compensation sequence and the pilot sequence to obtain a second frequency offset, so as to estimate the time delay of the access signal according to the second frequency offset. The present invention can accurately estimate the frequency offset of any size, so as to perform time delay estimation according to the frequency offset estimation result, thereby expanding the range of application scenarios.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a frequency offset estimation method, device, communication equipment and storage medium. Background technique [0002] The PRACH signal of LTE / NR is generated based on the discrete Fourier transform of the pilot sequence. The pilot sequence usually uses a ZC sequence with good autocorrelation, but the correlation peak of the ZC sequence with good autocorrelation is easily affected by frequency offset, which in turn affects The time delay estimation ultimately affects the correct processing of the PRACH signal. [0003] In order to avoid the influence of frequency offset on delay estimation, the existing technology usually adopts a restricted set, that is, constructs a restricted set suitable for a specific application scenario, so as to ensure that the spectral peak shift caused by the frequency offset of one times the subcarrier spacing will not affect the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L7/00
CPCH04L27/0014H04L7/007H04L2027/0026H04L5/0048H04L27/2657H04L27/26132H04L27/2675H04L27/2671H04L27/2663H04L27/26H04L25/02H04L5/00H04L7/00H04W24/02H04W56/00H04W72/04H04J11/00
Inventor 钱斌刘波邹刚荣元政干永刚
Owner CHENGDU CORESAT TECH CO LTD