Anti-fading multi-media wireless radio signal framing modulation method
A wireless broadcasting and framing modulation technology, applied in the direction of multi-frequency code system, etc., can solve the problems of signal distortion, sub-channel orthogonality destruction, system performance deterioration, etc., and achieve the effect of small amount of information and easy processing and recovery
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[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] According to an embodiment of a certain transmitter of the anti-fading multimedia wireless broadcast signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:
[0032] 1) The certain anti-fading multimedia wireless broadcast signal transmitter forms its input data bit stream in the frequency domain after RS coding, convolutional interleaving, multi-rate punctured convolutional coding, symbol modulation, and symbol interleaving FFT cascaded interleaving coding modulation data block, the length of FFT cascading interleaving coding modulation data block is K; the coding rate of multi-code rate punctured convolutional coding is 1 / 4, 1 / 2, 5 / 8, 3 / 4 and One of 7 / 8; the symbol modulation is one of QPSK, 16 QAM, 32QAM, 64QAM, 64APSK, 256APSK, 1024APSK, the symbol constellation mapping method ad...
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