A method and device for frequency offset estimation

A frequency offset estimation and offset estimation technology, applied in the field of frequency offset estimation, can solve the problems of increased implementation complexity and low accuracy

Active Publication Date: 2020-02-14
ZTE CORP
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  • Claims
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Problems solved by technology

[0003] At present, there are many high-precision and simple methods to solve the problem of small frequency offset; but for the problem of large frequency offset, the accuracy of the solution is relatively low, even if some methods improve the accuracy of frequency offset estimation, but It also increases the complexity of the implementation

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  • A method and device for frequency offset estimation
  • A method and device for frequency offset estimation
  • A method and device for frequency offset estimation

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0064] see figure 1 , which shows the flow of a frequency offset estimation method provided by the embodiment of the present invention. It should be noted that, in order to clearly describe the technical solution of the embodiment of the present invention, a UE is taken as an example in this embodiment. It can be understood that those skilled in the art may apply the embodiment of one UE as an example to the embodiment of multiple UEs without creative effort. The method can include:

[0065] S101: Perform initial channel estimation by receiving an SRS or Preamble code sent by a user equipment (UE, User Equipment), and obtain a first estimated frequency offset value of the current subframe of the UE;

[0066] Exemplarily, step S101 may specifically include:

[0067] First, b...

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Abstract

The disclosure provides a method, device and storage medium for frequency offset estimation, and the method includes: performing initial channel estimation with a received Sounding Reference Signal or Preamble code to obtain a first frequency offset estimation value of a current sub-frame; determining a frequency offset range in which the first frequency offset estimation value is located, and obtaining an initial frequency offset value corresponding to the first frequency offset estimation value according to a preset correspondence between the frequency offset range and the initial frequency offset value; determining a phase difference of adjacent pilot positions based on a received pilot frequency sequence included in the current sub-frame , and obtaining, within the range defined by the initial frequency offset value corresponding to the first frequency offset estimation value, a dual pilot frequency offset estimation value according to the phase difference; and obtaining a frequency offset estimation value of the current sub-frame according to the initial frequency offset value corresponding to the first frequency offset estimation value and the dual pilot frequency offset estimation value.

Description

technical field [0001] The invention relates to communication signal processing technology, in particular to a method and device for frequency offset estimation. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology is a multi-carrier transmission technology in which sub-carriers are orthogonal to each other. This technology requires that sub-carriers are orthogonal to each other and is very sensitive to carrier frequency offset; so , the problem of carrier frequency offset has become one of the core problems of current OFDM technology. [0003] At present, there are many high-precision and simple methods to solve the problem of small frequency offset; but for the problem of large frequency offset, the accuracy of the solution is relatively low, even if some methods improve the accuracy of frequency offset estimation, but It also increases the complexity of implementation. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L25/03
CPCH04L25/0224H04L27/2657H04L27/2671H04L27/2675H04L27/2682H04L27/2686H04L27/2695H04L27/26
Inventor 魏继东李斌
Owner ZTE CORP
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