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Frequency deviation estimation method and device, and communication equipment

A frequency offset and channel estimation technology, which is applied in channel estimation, sustainable communication technology, modulated carrier system, etc. Relatively small effect

Active Publication Date: 2019-12-24
上海移芯通信科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Frequency deviation estimation method and device, and communication equipment
  • Frequency deviation estimation method and device, and communication equipment
  • Frequency deviation estimation method and device, and communication equipment

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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 invention provides a frequency deviation estimation method and a device, and communication equipment. The frequency deviation estimation method comprises the following steps: acquiring at least three sections of received sampling data corresponding to a known channel estimation sequence; according to each section of received sampling data and the corresponding channel estimation sequence, obtaining a phase elimination sequence corresponding to each section of received sampling data; carrying out difference calculation on any two sections of phase elimination sequences to obtain a difference result corresponding to the two sections of phase elimination sequences, and obtaining a difference distance of the difference result according to a time interval between the two sections of phase elimination sequences; adding the differential results of all the same differential distances to obtain an accumulated differential item of each differential distance; performing weighted summation onall the accumulated differential items with different differential distances to obtain a mixed differential item; and estimating the frequency deviation between the data sender and the data receiver according to the mixed differential item. According to the method, the estimation accuracy of the frequency deviation can be improved under the condition of obtaining 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 Applications(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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