Method for framing and modulating wireless multimedia broadcast signals
A multimedia broadcasting and signal technology, applied in the direction of multi-frequency code system, etc., can solve problems such as mutual interference, signal distortion, system performance deterioration, etc.
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[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] According to an embodiment of a certain transmitter of the wireless multimedia broadcasting signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:
[0033] 1) The certain wireless multimedia broadcasting signal transmitter forms an FFT data block with its input data bit stream in the frequency domain, FFT represents fast discrete Fourier transform, and the length of the FFT data block is K;
[0034] 2) The certain wireless multimedia broadcasting signal transmitter adopts IFFT to transform the FFT data block into a time-domain discrete data sample block D total , IFFT stands for Inverse Fast Discrete Fourier Transform;
[0035] 3) The certain wireless multimedia broadcasting signal transmitter divides the time-domain discrete data sample value block into two in order, and the time-do...
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