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Method, device and communication device for estimating frequency deviation

A technology of frequency offset and channel estimation, which is applied in the field of mobile communication, can solve the problems of low accuracy of frequency offset estimation results and less obvious phase difference, and achieve the effect of improving estimation accuracy and relatively small error

Active Publication Date: 2022-05-20
上海移芯通信科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Since the time difference between one time slot interval is small, the phase difference caused by the frequency offset is not obvious, resulting in low precision of the frequency offset estimation result

Method used

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  • Method, device and communication device for estimating frequency deviation
  • Method, device and communication device for estimating frequency deviation
  • Method, device and communication device for estimating frequency deviation

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Embodiment Construction

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0048] In order to make the drawing concise, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. Herein, "a" not only means "only one", but also means "more than one".

[0049] In one emb...

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Abstract

The present invention provides a frequency deviation estimation method, device and communication equipment, comprising: obtaining at least 3 pieces of received sampling data corresponding to known channel estimation sequences; according to each piece of received sampling data and its corresponding channel estimation sequence, obtaining The phase elimination sequence corresponding to it; performing differential calculation on any two phase elimination sequences, obtaining the difference result corresponding to the two phase elimination sequences, and obtaining the difference according to the time interval between the two phase elimination sequences The differential distance of the result; by adding all the differential results of the same differential distance, the cumulative differential item of each differential distance is obtained; the cumulative differential items of all different differential distances are weighted and summed to obtain a mixed differential item; according to the A mixed difference term that estimates the frequency offset between the data sender and the data receiver. The present invention can improve the estimation accuracy of the frequency deviation under the acquisition of the same received data.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a frequency deviation estimation method, device and communication equipment. Background technique [0002] In mobile communication, the transmitter modulates the information to be sent onto the carrier, and sends the information to the receiver through the carrier. The receiver must regenerate this carrier in order to accurately demodulate the information from the transmitter. Although nominally this carrier is known in advance by the sender and the receiver, there is a frequency offset (referred to as frequency offset) between the carrier used by the sender and the carrier received by the receiver due to the following reasons: 1) User equipment ( 1) the clock accuracy of the UE is not high; 2) the Doppler frequency shift caused by the movement of the UE itself. The frequency offset has an impact on the baseband signal processing. When the frequency offset is large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L25/02
CPCH04L27/0014H04L25/0202H04L2027/0026Y02D30/70
Inventor 周亮李云飞
Owner 上海移芯通信科技股份有限公司
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