OFDM synchronous training sequence processing method and device

A training sequence and sequence technology, applied in the OFDM field, can solve the problems of not ensuring the timing synchronization accuracy of the synchronous training sequence and anti-multipath interference.

Inactive Publication Date: 2015-02-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the randomness of the generation process, it cannot be guaranteed that the synchronization training sequence generated each time has high timing synchronization accuracy and anti-multipath interference ability

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  • OFDM synchronous training sequence processing method and device
  • OFDM synchronous training sequence processing method and device
  • OFDM synchronous training sequence processing method and device

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Embodiment Construction

[0020] Specific implementations of the present invention will be described below. It should be noted that in the process of specific descriptions of these implementations, for the sake of concise description, it is impossible for this specification to describe all the features of the actual implementations in detail. It should be understood that, in the actual implementation process of any embodiment, just like in the process of any engineering project or design project, in order to achieve the developer's specific goals and to meet system-related or business-related constraints, Often a variety of specific decisions are made, and this can vary from one implementation to another. Furthermore, it will be appreciated that, while such development efforts may have been complex and lengthy, for those of ordinary skill in the art to which the present disclosure pertains, the disclosures disclosed in this disclosure Some design, manufacturing or production changes based on the techni...

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Abstract

The invention relates to an OFDM synchronous training sequence processing method and device. The method comprises the steps that multiple times of cycle shift is performed on an OFDM synchronous training sequence so that multiple cycle shift sequences are obtained; a cycle prefix is added before each cycle shift sequence so that candidate sequences are obtained; average gradient of a timing metric function of the candidate sequences is calculated; and the candidate sequence with the maximum average gradient acts as the OFDM synchronous training sequence after processing.

Description

technical field [0001] The present invention relates to the technical field of OFDM, in particular to a method and device for processing OFDM synchronous training sequences. [0002] Background technique [0003] Orthogonal Frequency Division Multiplexing (OFDM) is a special multi-carrier transmission technology, which is widely used in wireless communication systems such as digital audio broadcasting and wireless local area network. [0004] OFDM communication technology is very sensitive to synchronization errors. When carrier frequency deviation and timing errors occur, it will cause Inter-Carrier-Interference (ICI) and Inter-Symbol-Interference (ISI), seriously affecting the overall performance. [0005] In order to eliminate carrier frequency offset and timing error, the prior art usually adds a synchronization training sequence in front of each frame of OFDM transmission data. Since the synchronous training sequence is specially designed in terms of structure and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2678H04L27/2692
Inventor 杨帆李洋李玉柏邵怀宗王文钦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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