IAIPROVING THE CONSTITUENT CODES OF TURBO
M.S.C. Ho, S. Piet, Tim Gild · 1998
~~~ ~ ~ ~~~~ Abstract The performance of 'Turbo codes can he improved by choosing the hest, const,it,uent encoder. Previ- ous list,s of the best, const,it~neut codes were found based on maximising the input weight two ef- fective free dist,ance d?. We show that minimis- ing l,lie number of nearest neighhours .vi is also an important, requirriuent. If there are niult,i- ple codes having the same d2 and .V2, we show that, the ininiinuin distance dn,izz can he a useful crit,eria to identify the best, code. A list, of gen- erator polynomials suitable for Turbo codes are presented in this paper which satisfy the crite- ria mentioned above. The previously published results are also extended to include larger meni- ory.