2 results about "Ratio Sequence" patented technology

The application discloses a geometric constellation shaping joint coding modulation method based on deep learning, and belongs to the geometric constellation shaping method. By constructing an end-to-end system containing a deep learning modulator and a demodulator, a log-likelihood ratio calibration module is integrated at the end of the demodulator to output soft information matched with a decoder; a multi-objective joint loss function containing a cross-entropy loss, a generalized mutual information loss and a boundary constraint loss is determined; a phased training strategy of first freezing the calibration module for basic constellation shaping and then jointly fine-tuning is adopted; the trained modulator is deployed at a sending end for geometric constellation shaping mapping, and the demodulator is deployed at a receiving end to output a calibrated log-likelihood ratio sequence to the decoder. The application realizes deep collaboration of coding and modulation, and improves transmission reliability and spectral efficiency.