Technology for the next generation of digital terrestrial broadcasting : A study of decoding method of LDPC code in dual polarized MIMO transmission

Abstract

NHK is conducting research on the next generation of digital terrestrial broadcasting to enable large-volume content services such as Super Hi-Vision. In dual polarized MIMO transmission, we applied LDPC (Low Density Parity Check) code to FEC (Forward Error Correct) and previously reported a multi-dimensional interleaving scheme that reduces deterioration caused by the difference of channel responses of two polarizations. We developed the decoding algorism of LDPC code using channel responses of dual polarized MIMO transmission for the calculation of LLR (Log Likelihood Ratio) iteratively, and this paper reports the result of computer simulation.