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

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...

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