Coding and Modulation Method of Physical Frame Signaling Channel in ngb‑w System

A modulation method and a technology of physical frames, applied in the field of physical layer transmission, can solve the problem that the relative stability of signaling transmission performance cannot be guaranteed, and achieve the effect of stable reliability

Active Publication Date: 2017-11-03
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Problems solved by technology

[0009] (4) The DVB-T2 standard only supports one L1-pre signaling structure, and the length is fixed at 200 bits. This scheme cannot guarantee the relative stability of the signaling transmission performance of the variable length

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  • Coding and Modulation Method of Physical Frame Signaling Channel in ngb‑w System
  • Coding and Modulation Method of Physical Frame Signaling Channel in ngb‑w System
  • Coding and Modulation Method of Physical Frame Signaling Channel in ngb‑w System

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Embodiment Construction

[0046] The following describes the implementation of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0047] It should be noted that the illustrations provided in this embodiment only illustrate the basic idea of ​​the present invention in a schematic way, and the figures only show the components related to the present invention instead of the number, shape, and shape of the components in actual implementation. For size drawing, the type, quantity, and proportion of each component can be changed at will during actual implementation, and the co...

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Abstract

The invention discloses a method for encoding and modulating a physical frame signaling channel in an NGB-W system. The method comprises the following steps of: adding CRC (cyclic redundancy code) bits to physical frame signaling and scrambling the physical frame signaling; mapping the scrambled physical frame signaling into BCH (Broadcast Channel) code information bits; performing forward error correction coding to the BCH code information bits by BCH coding and LDPC (Low Density Parity Check) coding cascade methods; generating physical frame signaling check bits and forming physical frame signaling coding blocks; performing constellation mapping to the physical frame signaling coding blocks to generate BICM (Bit Interleaved Coded Modulation) blocks. The method is characterized in that a forward error correction coding solution with a reasonable structure and parameters, and LDPC codes including a QC-Raptor-Like structure and approaching a Claude Elwood Shannon threshold are adopted, and bit mapping of information with the changeable signaling length, code rate control and coding block generation can be supported; the physical frame signaling with the changeable length can be protected so that the transmission reliability of the physical frame signaling is relatively steady along with the change of the signaling length.

Description

Technical field [0001] The present invention relates to the technical field of physical layer transmission in a communication system, and particularly relates to a coding and modulation method of physical frame signaling in the Next Generation Broadcast Network-Wireless (NGB-W) system. Background technique [0002] With the rapid development of world economy and culture, users' demand for wireless information services has grown rapidly. Relying on traditional wireless broadcasting network or traditional wireless two-way communication network alone, it is no longer possible to achieve optimal transmission of information services. At the same time, people are no longer satisfied with just watching traditional wireless broadcast television services, but have an increasingly strong demand for new wireless broadcast television services. The NGB-W system can realize the fusion and coexistence of wireless broadcasting and wireless two-way communication. It is an effective way to solve ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04N21/2383
CPCH04L1/0008H04L1/0058H04L1/0063H04L1/0065H04N21/2383
Inventor 王芳徐扬田金凤王晓妮寇亚军李明齐缪军封松林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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