hi, i have implemnet soft decision viterbi decoder of constraintlength 7 on adsp black fin processor. can anybody sugegst some document regarding implementation on ADSP. i know the theory of viterbi decoder. I already implemenetd hard decision decoder on FPGA. Whether register excahneg algorithm is good or trace-back is good for DSP implementation. I wnat to know some information on calculation of eucldian distance for soft decision based on canstellation. regrads, sunil
viterbi on ADSP-blackfin
Started by ●April 10, 2006
Reply by ●April 12, 20062006-04-12
inaganti.sunil@gmail.com wrote:> hi, > i have implemnet soft decision viterbi decoder of > constraintlength 7 on adsp black fin processor. > can anybody sugegst some document regarding > implementation on ADSP. i know the theory of viterbi decoder. I already > implemenetd hard decision decoder on FPGA. Whether register excahneg > algorithm is good or trace-back is good for DSP implementation. I wnat > to know some information on calculation of eucldian distance for soft > decision based on canstellation. > > regrads, > sunilI am interested in implementing the Viterbi decoder on the Blackfin 535. Did you code it in assembler? What is the thru-put that you obtained? My data rate is only 50 Bits per sec for 12 channels. Thanks for your help, Bill Hanna
Reply by ●April 17, 20062006-04-17
hi, one of my collegue implemented that. i did not. i have to optimize that. so, i did not have idea how they implemented it. try on google u will get assembly code of viterbi decoder on adsp2191. try to implement the same way on blackfin. billh40@aol.com wrote:> inaganti.sunil@gmail.com wrote: > > hi, > > i have implemnet soft decision viterbi decoder of > > constraintlength 7 on adsp black fin processor. > > can anybody sugegst some document regarding > > implementation on ADSP. i know the theory of viterbi decoder. I already > > implemenetd hard decision decoder on FPGA. Whether register excahneg > > algorithm is good or trace-back is good for DSP implementation. I wnat > > to know some information on calculation of eucldian distance for soft > > decision based on canstellation. > > > > regrads, > > sunil > > I am interested in implementing the Viterbi decoder on the > Blackfin 535. > Did you code it in assembler? What is the thru-put that you obtained? > My data rate is only 50 Bits per sec for 12 channels. > > Thanks for your help, > Bill Hanna