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A signaling detection method and device based on preamble sequence

A technology of preamble sequence and sequence, which is applied in the field of signaling detection method and device based on preamble sequence, can solve the problems of poor detection robustness, achieve fast time domain synchronization and frequency offset estimation, improve defects, and accurately signal detection Effect

Active Publication Date: 2018-04-10
TSINGHUA UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to provide a preamble-based signaling detection method and device to solve the problem of poor detection robustness of signaling detection under harsh channel conditions in the prior art

Method used

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  • A signaling detection method and device based on preamble sequence
  • A signaling detection method and device based on preamble sequence
  • A signaling detection method and device based on preamble sequence

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Embodiment Construction

[0059] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0060] A signaling detection method and device based on a preamble sequence in the present invention is based on a structure such as figure 2 The preamble sequence shown is realized, and the specific structure of the sequence is based on OFDM multi-carrier technology, inserting two identical lengths of L sequence {a} in the OFDM subcarrier of length N, between the two sequences The interval of ΔL subcarriers, the value of ΔL can be changed within a certain range, so as to realize the transmission of system transmission parameter signaling. At the transmitter, the symbols in the frequency domain are transformed into the time domain using the Fast Fourier Transform, and th...

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Abstract

The invention provides a leader sequence-based signaling detection method and device. The method includes: extraction a time domain leader sequence carried in time domain data; performing fast Fourier transform on the time domain leader sequence to generate a corresponding frequency domain OFDM symbol; performing first differential demodulation on the frequency domain OFDM symbol and a local PN sequence, and performing circulatory moving correlation on the frequency domain OFDM symbol and local PN sequence after the first differential demodulation; performing second differential demodulation on the frequency domain OFDM symbol and the local PN sequence, and performing circulatory moving correlation on the frequency domain OFDM symbol and local PN sequence after the second differential demodulation; comparing two sets of moving correlation results to obtain a detection sequence, and obtaining system transmission parameter signaling and a frequency offset value according to the detection sequence, thereby realizing signaling detection. By adoption of the method and device provided by the invention, accurate signaling detection in a strong-selective-fading channel can be realized, and the method has stronger detection robustness compared with a conventional method.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a preamble sequence-based signaling detection method and device. Background technique [0002] With the rapid development of wireless communication technology and the increasing demand for wireless communication services, various advanced communication technologies have been proposed and put into application. In the field of digital TV, in order to meet people's increasing business needs and performance requirements, developed countries such as Europe, the United States, and Japan are vigorously exploring and researching digital TV standards, and have launched a new generation of digital TV standards one after another. [0003] The European Telecommunication Standards Institute (ETSI) promulgated the second-generation digital TV standard DVB-T2 (Second Generation System) in 2009, through the use of improved signal frame structure, transmit diversity technology a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 张超刘菁菁潘长勇王军
Owner TSINGHUA UNIV
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