Transferring ssytem of signal communication in digital multimedia broadcast system and mode

A technology of multimedia broadcasting and transmission mode, applied in the transmission system and transmission mode of control and data communication, audio and video fields, can solve the problem of no data channel, etc.
CN1516459AInactive Publication Date: 2004-07-28TIMI TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TIMI TECH
Publication Date
2004-07-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a system and mode of new signal multi-path multiplexing in OFDM broadcast network. In the invention, the mixed signals are modulated into different OFDM communication channels, each channel data includes a fixed quantity OFDM sub-carriers. Different Golay code, modulation and frequency expansion are used in communication of different service quality demand. The data is transmitted with data package of circular redundancy checking bit.
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Description

technical field

[0001] The present invention relates to the transmission system and transmission mode of signal communication in digital multimedia broadcasting system, especially relates to the transmission system and transmission mode of video, audio, control and data communication in digital multimedia broadcasting system. Background technique

[0002] A major challenge for next generation wireless broadcast networks is to support integrated multimedia type communications on a unified network platform. An efficient transport mode that can support various types of traffic with various data rates is very important to achieve the above requirements.

[0003] The current European digital video broadcasting system (DVB-T) chooses Orthogonal Frequency Division Multiplexing (OFDM) as the modulation mode because of its robustness against multipath fading, high spectral Efficiency and other advantages. Combined with preamble error detection, OFDM (Orthogonal Frequency Division M...

Claims

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