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Multicarrier digital mobile multimedia broadcast system, and digital information transmission method

一种移动多媒体、传输方法的技术，应用在数字多媒体广播系统及其信息传输领域，能够解决性能不够理想等问题

Inactive Publication Date: 2007-05-09
TIMI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Japanese and Korean digital satellite broadcasting standards can support mobile reception, the performance is still not ideal and needs further improvement

Method used

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  • Multicarrier digital mobile multimedia broadcast system, and digital information transmission method
  • Multicarrier digital mobile multimedia broadcast system, and digital information transmission method
  • Multicarrier digital mobile multimedia broadcast system, and digital information transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The invention can provide multimedia programs including high-quality digital audio broadcasting and digital video broadcasting.

[0051] The present invention defines each functional module of the physical layer capable of adapting and processing the broadcast upper layer data stream of the mobile multimedia broadcasting system in each 8MHz frequency band, and provides the frame structure, channel coding and modulation technology of the physical layer transmission signal of the mobile multimedia broadcasting channel .

[0052] The physical layer is the bottom layer of OSI and the foundation of the entire open system. The physical layer provides transmission media and interconnection devices for data communication between devices, and provides a reliable environment for data transmission.

[0053]The physical layer of the broadcast channel defined by the present invention adapts to the different requirements of various applications on the upper layer for the transmissio...

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Abstract

The method comprises: after sequentially making RS coding and byte interlace, LDPC coding, bit interlace and constellation mapping for the upper layer data, the acquired data symbol, discrete pilot frequency and the continuous polite frequency are multiply connected to form OFDM polite frequency and make scrambling; generating OFDM symbol through IFFT transformation, and after forming time slot through inserting frame head, they are connected to form signal frame of physical layer; after making low pass filter and quadrature up-conversion for the physical layer signal frame, they are sent out. The invention can provide radio broadcast such as audio, video and multicast for mobile, fixed and portable receiver. The system thereof uses micro wave and large-scale IC technology. The method adopts OFDM of LDPC solution.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a digital multimedia broadcasting system and an information transmission method thereof. Background technique [0002] In addition to wide coverage and large program capacity, wireless communication broadcasting is characterized by broadcasting, point-to-multipoint, point-to-face, and high transmission bandwidth under low-cost conditions. Therefore, as an important part of the information communication industry, wireless communication broadcasting plays an important role in the construction of national information infrastructure, the realization of universal service and the national information security strategy. [0003] After years of research and development, digital wireless broadcasting has achieved many results and reached the practical stage. At present, there are four main wireless digital TV broadcasting standards in the world: [0004] 1) Digit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/707H04J13/00H04H1/00H04H20/00
CPCH04L1/0057H04L27/2626H04L1/0071H04L1/0065H04L27/2602
Inventor 陶涛白栋葛启宏宋挥师梁毅斌杨庆华王联李群申红兵
Owner TIMI TECH
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