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Method and apparatus for estimating frequency offset, and record medium

一种频率偏移、测定部的技术，应用在传输路径的分离装置、多频码系统、导频信号分配等方向，能够解决准确度有限、无法验证频率偏移推测值等问题，达到干扰现象提高、提高准确度的效果

Active Publication Date: 2019-04-02
DIALOG SEMICON KOREA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the prior art and Korean Laid-Open Patent No. 10-2005-0034116 only use between training signals separated by a certain time interval, so the frequency offset estimation value cannot be verified and the achievable accuracy is limited

Method used

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  • Method and apparatus for estimating frequency offset, and record medium
  • Method and apparatus for estimating frequency offset, and record medium
  • Method and apparatus for estimating frequency offset, and record medium

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Embodiment Construction

[0021] Hereinafter, an embodiment of the present invention will be described in detail with illustrative drawings. It should be noted that, when attaching reference signs to constituent elements in each drawing, even if the same constituent elements are shown in different drawings, the same reference numerals are used as much as possible. In addition, when describing an embodiment of the present invention, if it is judged that a detailed description of a related well-known configuration or function will obscure the gist of the present invention, the detailed description will be omitted.

[0022] When describing the components of the embodiments of the present invention, symbols such as first, second, i), ii), a) and b) may be used. These symbols are only used to distinguish the constituent elements from other constituent elements, and the nature, order, sequence, etc. of the corresponding constituent elements are not limited by the above symbols. In this specification, when i...

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PUM

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Abstract

According to an embodiment of the invention, an apparatus for estimating frequency offsets by periodically transmitting a plurality of training signals from a transmitting end of a wireless local areanetwork system is provided. The apparatus includes a receiving unit that receives the plurality of training signals, a measuring unit that measures a phase of each training signal received by the receiving unit in a predetermined measurement period, a storage unit which stores the phase, of the training signal, measured by the measuring unit, and an operation unit which reads the phase of the training signal pair separated by each time interval from the storage unit for a predetermined plurality of time intervals, respectively, estimates a frequency offset based on the average value after calculating an average value of the phase differences of the training signal pair, and assigns a weighted value to each calculated frequency offset estimation value to calculate a weighted average.

Description

technical field [0001] The present invention relates to a method for estimating frequency offset, in particular to a method for estimating frequency offset by using a short training signal sequence (Short Training Field, STF) in a wireless local area network (Wireless Local Area Network) system. Background technique [0002] What is described in this section is only to provide background information of the present invention and does not constitute prior art. [0003] Generally, Orthogonal Frequency Division Multiplexing (hereinafter referred to as "OFDM") is a data transmission method as follows: After converting a high-speed data signal into a low-speed data signal, the modulated data signal is transmitted to Subcarriers (sub-carriers) that are orthogonal to each other. [0004] In the OFDM method, when a frequency offset (offset) occurs between the transmitting and receiving ends, the orthogonality between the subcarriers is reduced, causing channel interference (ICI: Int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2657H04L27/2688H04L27/2671H04L27/2675H04L27/2682H04L5/0007H04L5/0048H04L2027/0093H04L2027/0026H04L27/0014H04W84/12H04L27/2695H04B7/0684H04L27/2672
Inventor 姜炳守
Owner DIALOG SEMICON KOREA INC