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Carrier frequency synchronization method

A carrier frequency and spectrum technology, applied in the field of carrier frequency synchronization, can solve the problems of reduced transmission efficiency

Active Publication Date: 2016-05-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a carrier frequency synchronization method to solve the technical problem of lower transmission efficiency caused by the existing carrier frequency synchronization method

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Embodiment Construction

[0026] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of means consistent with aspects of the invention as recited in the appended claims.

[0027] Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0028] Please refer to figure 2 , which is a flowchart of a carrier frequency synchronization method provided in an embodiment of the present invention.

[0029] Depend on figure...

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Abstract

The invention discloses a carrier frequency synchronization method. The carrier frequency synchronization method comprises following steps: overlapping training sequences and main information, thus obtaining a mixed frequency spectrum; calculating the frequency offset estimated value of the mixed frequency spectrum; and carrying out frequency offset compensation according to the frequency offset estimated value, wherein the training sequences comprise K repeated Kasami sequences with lengths of A and N-KA zeros; the N is subcarrier number of the main information; and the K is the integer part of N / A. According to the carrier frequency synchronization method provided by the invention, the training sequences are overlapped on the basis of an OFDM frequency domain; the frequency spectrum cost of OFDM signals is unnecessarily occupied; the method has strong robustness; and the technical problem of reducing transmission efficiency resulted from the existing carrier frequency synchronization method can be solved.

Description

technical field [0001] The present invention relates to the technical field of power line communication, in particular to a carrier frequency synchronization method. Background technique [0002] The centralized power generation, manual fault recovery, and one-way power / information flow of the traditional power grid determine its unsatisfactory characteristics in many aspects such as energy conversion efficiency, safety, reliability, and flexibility. For this reason, people have proposed Smart grid concept. The smart grid is built on the basis of an integrated, high-speed two-way communication network. Through the application of advanced sensing and measurement technology, advanced equipment technology, advanced control method and advanced decision support system technology, the reliability and safety of the power grid can be realized. , economical, efficient, environmentally friendly and safe to use. Power multi-carrier communication technology provides an effective solut...

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2655H04L27/2657
Inventor 翟少磊张建伟李博张林山于辉沈鑫朱梦梦唐标林聪朱全聪
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST