A kind of framing modulation method of multimedia mobile broadcasting signal
A mobile broadcasting and multimedia technology, applied in multi-frequency code systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as system performance deterioration, signal spectrum changes, and mutual interference
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[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0034] According to an embodiment of a certain transmitter of the multimedia mobile broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:
[0035] 1) The certain multimedia mobile broadcast signal transmitter forms an FFT coded data block in the frequency domain through serial concatenated multi-rate punctured convolution coding, symbol modulation and symbol rotation on its input data bit stream, and the FFT Indicates the fast discrete Fourier transform, and the length of the FFT coded data block is K; the serial concatenated multi-rate punctured convolutional code is formed by two convolutional codes through random interleaving and serial concatenated puncture, and the serial concatenated multiple The coding rate of the code rate punctured convolutional coding is one of 1 / 4, 4 / 9,...
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