Research and Improvement on IRA-LDPC Decoding Algorithm in DVB-S2
Lina Yu · Video Engineering · 2009
The encoding principle,the characteristics of IRA code and parity check metrics of LDPC in DVB-S2 are analyzed in this paper firstly,and the parameters of Tanner graph of LDPC in the standard are summarized.Then the performance and complexity of different decoding algorithms are compared and the distribution of decision information in LDPC of different iterations are analyzed.Finally the performance and complexity of different decoding algorithm are summarized.According to the simulation results,the SPA decoding algorithm performs best with the most complexity,the MinSum decoding algorithm performs worst with the least complexity,the modified MinSum decoding algorithm performs modest between the former two algorithms,it can be used in the actual project.