Generating method and receiving method for preamble symbol

A preamble symbol and symbol technology, applied in the field of wireless broadcast communication, can solve problems such as coherent detection not applicable, reception algorithm failure, no cyclic prefix, etc., achieve good timing synchronization performance, solve performance degradation, and good fractional frequency offset estimation performance effect

Inactive Publication Date: 2017-04-26
SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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  • Abstract
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  • Claims
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Problems solved by technology

[0010] The problem solved by the present invention is that in the current DVB_T2 standard and other standards, there is no DVB_T2 time domain structure. The problem of failure probability of low-complexity receiving algorithm detection of preamble symbols in complex frequency-selective fading channels

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  • Generating method and receiving method for preamble symbol
  • Generating method and receiving method for preamble symbol
  • Generating method and receiving method for preamble symbol

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Embodiment Construction

[0046] The inventors found that in the current DVB_T2 standard and other standards, there is no cyclic prefix in the DVB_T2 time domain structure, which cannot be applied to coherent detection, and the low-complexity receiving algorithm detection of the preamble symbol has a problem of failure probability in complex frequency selective fading channels.

[0047] In view of the above problems, the inventor provided a method for generating and receiving preamble symbols after research, which solves the problem of performance degradation of non-coherent detection, has good decimal frequency offset estimation performance and timing synchronization performance, and can also avoid The problem of small bias estimation failure in some special-length multipath channels ensures that the delay correlation can be used to obtain obvious peaks at the receiving end, avoiding the above-mentioned situation of false detection of peaks.

[0048] In order to make the above objects, features and adv...

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Abstract

The invention provides a generating method and a receiving method for a preamble symbol. The generating method is characterized by comprising the steps of: generating a time domain symbol having an arbitrarily three-segment structure based on an obtained time-domain main body signal; and generating a preamble symbol based on one or two time domain symbols. The generating method and the receiving method solve the problems that a DVB_T2 time domain structure in the existing DVB_T2 standard and other standards cannot be applied to coherent detection and the failure probability of the preamble symbol occurs in low-complexity receiving algorithm detection under a complex frequency selective fading channel.

Description

[0001] This application is a divisional application of the original application, the application number of the original application is 201410753506.X, the application date is December 10, 2014, and the title of the invention is "Method for generating and receiving leading symbols". technical field [0002] The invention relates to the technical field of wireless broadcast communication, in particular to a method for generating and receiving a preamble symbol. 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 correct the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L5/0048H04L27/26H04L27/2607H04L27/2613H04L27/2692
Inventor 张文军邢观斌黄戈
Owner SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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