A transmission system and method of the mobile digital multimedia broadcast signals
A technology of signal transmission system and multimedia broadcasting, applied in multi-frequency code system, orthogonal multiplexing system, multiplexing communication, etc. And other issues
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[0081] According to another aspect of the present invention, the present invention proposes an implementation manner of a mobile digital multimedia broadcasting signal transmission method. The mobile digital multimedia broadcasting signal transmission method includes: a) receiving a data stream and transmitting the data stream Converted to a bit stream after encoding and interleaving; b) mapping the bit stream output by the channel encoder to a symbol stream in QAM, BPSK or QPSK mode; c) inserting scattered pilots and continuous pilots into the output of the constellation mapping module After the symbol flow, it is loaded into effective subcarriers to form OFDM symbols. The corresponding relationship between the subcarriers, data and pilots of the OFDM symbol forming module is: (1) the effective subcarrier numbers are 0~3075 (when the channel bandwidth bit is 8MHz) or 0~627 (when the channel bandwidth bit is 2MHz); (2) Insert scattered pilots, in even OFDM symbols (starting fro...
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