Receiving and processing method of frequency domain OFDM symbol

A processing method and technology in the frequency domain, applied in the field of receiving and processing OFDM symbols in the frequency domain, and can solve problems such as failure probability

Inactive Publication Date: 2017-10-27
SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem solved by the present invention is the problem of the failure probability of the preamble symbol in the low-complexity receiving algorithm detection under the complex frequency selective fading channel in the current DVB_T2 standard and other standards

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  • Receiving and processing method of frequency domain OFDM symbol
  • Receiving and processing method of frequency domain OFDM symbol
  • Receiving and processing method of frequency domain OFDM symbol

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Embodiment Construction

[0019] The inventors found that in the current DVB_T2 standard and other standards, there is a problem of failure probability in the low-complexity receiving algorithm detection of preamble symbols in complex frequency selective fading channels.

[0020] In view of the above problems, the inventor provided a method for receiving and processing frequency-domain OFDM symbols after research. For the structure of a specific frequency-domain OFDM symbol, when there is a preamble symbol to be received in the received baseband signal, through The signal containing the subcarriers of the signaling sequence is operated with the set of subcarriers of the signaling sequence or the time-domain signal corresponding to the set of subcarriers of the signaling sequence, so as to solve the signaling carried by the signaling subcarriers in the frequency domain OFDM symbol information.

[0021] In order to make the above objects, features and advantages of the present invention more comprehensib...

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Abstract

The invention discloses a receiving and processing method of a frequency domain OFDM symbol. The frequency domain OFDM symbol comprises effective sub-carriers and zero-sequence subcarriers, wherein the zero-sequence subcarriers are located at the two sides of each effective subcarrier; and each effective subcarrier comprises a fixed-sequence subcarrier and a signaling-sequence subcarrier, and the fixed-sequence subcarriers and the signaling-sequence subcarriers are in odd-even staggered arrangement. The receiving and processing method comprises the following steps of when a precursor symbol which is expected to be received exists in a received baseband signal, computing through a signal containing the signaling-sequence subcarriers and a signaling-sequence subcarrier set or a time domain signal corresponding to the signaling-sequence subcarrier set so as to work out signaling information carried by the signaling-sequence subcarriers in the frequency domain OFDM symbol. The technical scheme solves a problem of detection failure probability of the precursor symbol in a complex frequency selective fading channel by using a low-complexity receiving algorithm in the current DVB-T2 standard and other standards.

Description

[0001] This application is a divisional application of the original application, the application number of the original application is 201410326651.X, the application date is July 10, 2014, and the invention name is "Frequency Domain OFDM Symbol Receiving and Processing Method". technical field [0002] The invention relates to the technical field of wireless broadcast communication, in particular to a method for receiving and processing frequency-domain OFDM symbols. Background technique [0003] Generally, in order for the receiving end of the OFDM system to correctly demodulate the data sent by the sending end, the OFDM system must realize accurate and reliable time synchronization between the sending end and the receiving end. At the same time, since the OFDM system is very sensitive to the frequency offset of the carrier, the receiving end of the OFDM system also needs to provide an accurate and efficient carrier spectrum estimation method to accurately estimate and corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2602H04L27/261
Inventor 张文军黄戈邢观斌徐洪亮何大治管云峰
Owner SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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