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A frequency offset processing method and system

A frequency offset and effective frequency offset technology, applied in the field of communication, can solve the problems of inaccurate frequency offset estimation and inability to accurately compensate frequency offset, so as to ensure accuracy, overcome the problem of inaccurate or impossible compensation of frequency offset, and improve Effects of Accuracy and Stability

Active Publication Date: 2019-11-29
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a frequency offset processing method and system to solve the problem that the frequency offset cannot be accurately compensated due to inaccurate frequency offset estimation

Method used

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  • A frequency offset processing method and system
  • A frequency offset processing method and system
  • A frequency offset processing method and system

Examples

Experimental program
Comparison scheme
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Embodiment 2

[0090] refer to figure 2 , shows a flowchart of steps of a frequency offset processing method in Embodiment 2 of the present invention. In this embodiment, the frequency offset processing method includes:

[0091] Step 202, acquiring the current frequency offset state.

[0092] In this embodiment, the current frequency offset state includes, but is not limited to: the current antenna state and the current field number.

[0093] Step 204, judging whether the current frequency offset state is consistent with the historical effective frequency offset state.

[0094] In this embodiment, the historical effective frequency offset state is the corresponding frequency offset state when the decoding result is correct. The historical effective frequency offset state includes, but not limited to: historical effective antenna state, historical effective field number, and historical effective frequency offset estimated value.

[0095] Preferably, the step 204 may specifically include:...

Embodiment 3

[0133] In combination with the foregoing embodiments, this embodiment uses a specific example to describe the frequency offset processing method in detail.

[0134] refer to image 3 , shows a flowchart of steps of a frequency offset processing method in Embodiment 3 of the present invention. In this embodiment, the frequency offset processing method includes:

[0135] Step 302, acquire the current frequency offset state.

[0136] In this embodiment, the current frequency offset state includes: the current antenna state and the current field number.

[0137] Step 304, judging whether the current antenna state is consistent with the historical effective antenna state.

[0138] In this embodiment, if it is determined that the current antenna state is consistent with the historical effective antenna state, the following step 306 is performed.

[0139] Step 306, judging whether the difference between the current field number and the historical effective field number is less th...

Embodiment 4

[0173] Based on the same inventive concept as the above-mentioned method embodiment, refer to Figure 4 , shows a structural block diagram of a frequency offset processing system in Embodiment 4 of the present invention. In this embodiment, the frequency offset processing system includes:

[0174] The first acquiring module 402 is configured to acquire the current frequency offset state.

[0175] The first judging module 404 is configured to judge whether the current frequency offset state is consistent with the historical effective frequency offset state.

[0176] In this embodiment, the historical effective frequency offset state is the corresponding frequency offset state when the decoding result is correct.

[0177] The first execution module 406 is configured to perform pre-compensation on the fine frequency offset estimation according to the historical effective frequency offset state when the current frequency offset state is consistent with the historical effective f...

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Abstract

The present invention provides a frequency offset processing method and system, wherein the method includes: obtaining the current frequency offset state; judging whether the current frequency offset state is consistent with the historical effective frequency offset state; wherein the historical effective frequency offset The state is the corresponding frequency offset state when the decoding result is correct; if they are consistent, the fine frequency offset estimation is pre-compensated according to the historical effective frequency offset state. The invention solves the problem that the frequency offset cannot be compensated accurately due to inaccurate estimation of the frequency offset.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a frequency offset processing method and system. Background technique [0002] In a wireless communication system, due to the frequency difference between the sending device and the receiving device, and the Doppler frequency shift caused by the movement of the sending device, there is a frequency gap between the carrier frequency received by the receiving device and the frequency of the local crystal oscillator. Offset, referred to as frequency offset. Especially in the cell of the high-speed railway covered by the mobile communication system, the moving speed of the equipment (user equipment) is relatively high (for example, in the cell of the high-speed railway covered by the mobile communication system, the moving speed of the equipment is generally above 300km / h) , will lead to a very serious Doppler effect, the maximum Doppler frequency can reach more than 15...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/266H04W56/001H04L27/26
Inventor 陈跃潭张晓娟
Owner DATANG MOBILE COMM EQUIP CO LTD