Interference-resistance framing modulation method for mobile signals of multimedia broadcasting single frequency network
A technology for multimedia broadcasting and mobile signals, applied in multi-frequency code systems, shaping networks in transmitter/receiver, digital transmission systems, etc., and can solve problems such as sub-channel orthogonality destruction, system performance deterioration, and signal distortion.
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[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] According to the embodiment of the single frequency network transmitter of the multimedia broadcast single frequency network anti-jamming mobile signal framing modulation method proposed by the present invention, as figure 1 shown, follow these steps:
[0031] 1) The network data manager of the single frequency network forms an FFT bit-interleaved coded modulation data block in the frequency domain through multi-rate punctured convolutional coding, bit interleaving, symbol modulation and symbol rotation of the input data bit stream, and FFT represents Fast Discrete Fourier Transform, FFT bit interleaving coding, the length of the modulation data block is K; the coding rate of multi-code rate punctured convolutional coding is one of 1 / 4, 1 / 2, 5 / 8, 3 / 4 and 7 / 8 One, the bit interleaving adopts random interleaving, the symbol modulation is...
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