Signal-to-noise ratio weighting based OFDM system non-linear demapping method
A technology of signal-to-noise ratio and demapping, applied in baseband systems, baseband system components, transmission systems, etc., can solve the problems of low data reliability, low data reliability, and platform effect in packet error rate.
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 The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
 A kind of OFDM system non-linear demapping method based on signal-to-noise ratio weighting for obtaining the soft decision information required for decoding the received data signal of the OFDM system is: according to the channel coefficient of each subcarrier in the received data signal and the signal Calculate the absolute SNR of each subcarrier based on the overall SNR; calculate the non-linear demapping curve of each subcarrier weighted by the SNR based on the absolute SNR and the reference SNR of the signal; The channel equalization data of each subcarrier in the symbol is mapped through the nonlinear demapping curve weighted by the SNR to obtain the SNR weighted quantization value, and the SNR weighted quantization value after signal equalization is obtained, and then mapped to obtain the soft decision information.
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