Research on channel coding and decoding for DMR standard
Huan Li · Jisuanji yingyong yanjiu · 2012
For better performance of DMR system,this paper focused on rate 3/4 trellis code and QR(quadratic residue) code in DMR standard.As for the rate 3/4 trellis code,it proposed two different decoding algorithms.One made full use of the characteristics of finite state machine,and the other refined the butterfly computation in viterbi decoding algorithm.It presented a new algorithm to decode QR code by computing the weight of its syndrome polynomial.Simulational results show that the two decoding methods for rate 3/4 trellis code have similar performance,but the first has less computational effort and can be implemented conveniently.Meanwhile,the new algorithm for QR decoding avoids solving the complicated error polynominal and has better performance.