May 20, 2009 #1 B bimsriraj Junior Member level 1 Joined Aug 8, 2008 Messages 17 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,393 spread spectrum hi, where convoultion coding will be used for CDMA systems before spreading the data or after spreading & why?
spread spectrum hi, where convoultion coding will be used for CDMA systems before spreading the data or after spreading & why?
May 22, 2009 #2 Aya2002 Advanced Member level 4 Joined Dec 12, 2006 Messages 1,140 Helped 184 Reputation 376 Reaction score 117 Trophy points 1,343 Location Iraq Activity points 8,006 spread spectrum me to
May 23, 2009 #3 C Communications_Engineer Advanced Member level 3 Joined Oct 10, 2008 Messages 894 Helped 179 Reputation 358 Reaction score 105 Trophy points 1,323 Location Sindh, Pakistan Activity points 5,542 spread spectrum before spreading... why... for obvious reasons, after spreading we would have to do conv coding for more bits, at a higher data rate, thats not too bad, right? but what about the subsequent viterbi decoding at higher rate and for more bits? There are other reasons too.
spread spectrum before spreading... why... for obvious reasons, after spreading we would have to do conv coding for more bits, at a higher data rate, thats not too bad, right? but what about the subsequent viterbi decoding at higher rate and for more bits? There are other reasons too.
May 23, 2009 #4 Aya2002 Advanced Member level 4 Joined Dec 12, 2006 Messages 1,140 Helped 184 Reputation 376 Reaction score 117 Trophy points 1,343 Location Iraq Activity points 8,006 spread spectrum thanks communication engineer